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* A small subset of control-flow refinements have been added to
recognize type options that are unreachable after a
conditional/unconditional code block. (Fixes
https://github.com/Roblox/luau/issues/356).

Some examples:
```lua
local function f(x: string?)
    if not x then return end

    -- x is 'string' here
end
```
Throwing calls like `error` or `assert(false)` instead of 'return' are
also recognized.
Existing complex refinements like type/typeof and tagged union checks
are expected to work, among others.

To enable this feature, `LuauTinyControlFlowAnalysis` exclusion has to
be removed from `ExperimentalFlags.h`.
If will become enabled unconditionally in the near future.

* Linter has been integrated into the typechecker analysis so that
type-aware lint warnings can work in any mode
`Frontend::lint` methods were deprecated, `Frontend::check` has to be
used instead with `runLintChecks` option set.
Resulting lint warning are located inside `CheckResult`.

* Fixed large performance drop and increased memory consumption when
array is filled at an offset (Fixes
https://github.com/Roblox/luau/issues/590)
* Part of [Type error suppression
RFC](https://github.com/Roblox/luau/blob/master/rfcs/type-error-suppression.md)
was implemented making subtyping checks with `any` type transitive.

---
In our work on the new type-solver:
* `--!nocheck` mode no longer reports type errors
* New solver will not be used for `--!nonstrict` modules until all
issues with strict mode typechecking are fixed
* Added control-flow aware type refinements mentioned earlier

In native code generation:
* `LOP_NAMECALL` has been translated to IR
* `type` and `typeof` builtin fastcalls have been translated to
IR/assembly
* Additional steps were taken towards arm64 support
This commit is contained in:
vegorov-rbx 2023-03-17 21:20:37 +02:00 committed by GitHub
parent 9311c0c57a
commit 42a2805f85
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84 changed files with 2496 additions and 685 deletions
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41
Analysis/include/Luau/ConstraintGraphBuilder.h
View file

@ -2,12 +2,13 @@
#pragma once
#include "Luau/Ast.h"
#include "Luau/Refinement.h"
#include "Luau/Constraint.h"
#include "Luau/ControlFlow.h"
#include "Luau/DataFlowGraph.h"
#include "Luau/Module.h"
#include "Luau/ModuleResolver.h"
#include "Luau/NotNull.h"
#include "Luau/Refinement.h"
#include "Luau/Symbol.h"
#include "Luau/Type.h"
#include "Luau/Variant.h"
@ -141,26 +142,26 @@ struct ConstraintGraphBuilder
*/
void visit(AstStatBlock* block);
void visitBlockWithoutChildScope(const ScopePtr& scope, AstStatBlock* block);
ControlFlow visitBlockWithoutChildScope(const ScopePtr& scope, AstStatBlock* block);
void visit(const ScopePtr& scope, AstStat* stat);
void visit(const ScopePtr& scope, AstStatBlock* block);
void visit(const ScopePtr& scope, AstStatLocal* local);
void visit(const ScopePtr& scope, AstStatFor* for_);
void visit(const ScopePtr& scope, AstStatForIn* forIn);
void visit(const ScopePtr& scope, AstStatWhile* while_);
void visit(const ScopePtr& scope, AstStatRepeat* repeat);
void visit(const ScopePtr& scope, AstStatLocalFunction* function);
void visit(const ScopePtr& scope, AstStatFunction* function);
void visit(const ScopePtr& scope, AstStatReturn* ret);
void visit(const ScopePtr& scope, AstStatAssign* assign);
void visit(const ScopePtr& scope, AstStatCompoundAssign* assign);
void visit(const ScopePtr& scope, AstStatIf* ifStatement);
void visit(const ScopePtr& scope, AstStatTypeAlias* alias);
void visit(const ScopePtr& scope, AstStatDeclareGlobal* declareGlobal);
void visit(const ScopePtr& scope, AstStatDeclareClass* declareClass);
void visit(const ScopePtr& scope, AstStatDeclareFunction* declareFunction);
void visit(const ScopePtr& scope, AstStatError* error);
ControlFlow visit(const ScopePtr& scope, AstStat* stat);
ControlFlow visit(const ScopePtr& scope, AstStatBlock* block);
ControlFlow visit(const ScopePtr& scope, AstStatLocal* local);
ControlFlow visit(const ScopePtr& scope, AstStatFor* for_);
ControlFlow visit(const ScopePtr& scope, AstStatForIn* forIn);
ControlFlow visit(const ScopePtr& scope, AstStatWhile* while_);
ControlFlow visit(const ScopePtr& scope, AstStatRepeat* repeat);
ControlFlow visit(const ScopePtr& scope, AstStatLocalFunction* function);
ControlFlow visit(const ScopePtr& scope, AstStatFunction* function);
ControlFlow visit(const ScopePtr& scope, AstStatReturn* ret);
ControlFlow visit(const ScopePtr& scope, AstStatAssign* assign);
ControlFlow visit(const ScopePtr& scope, AstStatCompoundAssign* assign);
ControlFlow visit(const ScopePtr& scope, AstStatIf* ifStatement);
ControlFlow visit(const ScopePtr& scope, AstStatTypeAlias* alias);
ControlFlow visit(const ScopePtr& scope, AstStatDeclareGlobal* declareGlobal);
ControlFlow visit(const ScopePtr& scope, AstStatDeclareClass* declareClass);
ControlFlow visit(const ScopePtr& scope, AstStatDeclareFunction* declareFunction);
ControlFlow visit(const ScopePtr& scope, AstStatError* error);
InferencePack checkPack(const ScopePtr& scope, AstArray<AstExpr*> exprs, const std::vector<std::optional<TypeId>>& expectedTypes = {});
InferencePack checkPack(const ScopePtr& scope, AstExpr* expr, const std::vector<std::optional<TypeId>>& expectedTypes = {});

8
Analysis/include/Luau/ConstraintSolver.h
View file

@ -143,6 +143,14 @@ struct ConstraintSolver
bool block(TypeId target, NotNull<const Constraint> constraint);
bool block(TypePackId target, NotNull<const Constraint> constraint);
/**
* For all constraints that are blocked on one constraint, make them block
* on a new constraint.
* @param source the constraint to copy blocks from.
* @param addition the constraint that other constraints should now block on.
*/
void inheritBlocks(NotNull<const Constraint> source, NotNull<const Constraint> addition);
// Traverse the type. If any blocked or pending types are found, block
// the constraint on them.
//

36
Analysis/include/Luau/ControlFlow.h Normal file
View file

@ -0,0 +1,36 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#pragma once
#include <memory>
namespace Luau
{
struct Scope;
using ScopePtr = std::shared_ptr<Scope>;
enum class ControlFlow
{
None = 0b00001,
Returns = 0b00010,
Throws = 0b00100,
Break = 0b01000, // Currently unused.
Continue = 0b10000, // Currently unused.
};
inline ControlFlow operator&(ControlFlow a, ControlFlow b)
{
return ControlFlow(int(a) & int(b));
}
inline ControlFlow operator|(ControlFlow a, ControlFlow b)
{
return ControlFlow(int(a) | int(b));
}
inline bool matches(ControlFlow a, ControlFlow b)
{
return (a & b) != ControlFlow(0);
}
} // namespace Luau

12
Analysis/include/Luau/Frontend.h
View file

@ -89,14 +89,21 @@ struct FrontendOptions
// order to get more precise type information)
bool forAutocomplete = false;
bool runLintChecks = false;
// If not empty, randomly shuffle the constraint set before attempting to
// solve. Use this value to seed the random number generator.
std::optional<unsigned> randomizeConstraintResolutionSeed;
std::optional<LintOptions> enabledLintWarnings;
};
struct CheckResult
{
std::vector<TypeError> errors;
LintResult lintResult;
std::vector<ModuleName> timeoutHits;
};
@ -133,8 +140,9 @@ struct Frontend
CheckResult check(const ModuleName& name, std::optional<FrontendOptions> optionOverride = {}); // new shininess
LintResult lint(const ModuleName& name, std::optional<LintOptions> enabledLintWarnings = {});
LintResult lint(const SourceModule& module, std::optional<LintOptions> enabledLintWarnings = {});
// Use 'check' with 'runLintChecks' set to true in FrontendOptions (enabledLintWarnings be set there as well)
LintResult lint_DEPRECATED(const ModuleName& name, std::optional<LintOptions> enabledLintWarnings = {});
LintResult lint_DEPRECATED(const SourceModule& module, std::optional<LintOptions> enabledLintWarnings = {});
bool isDirty(const ModuleName& name, bool forAutocomplete = false) const;
void markDirty(const ModuleName& name, std::vector<ModuleName>* markedDirty = nullptr);

2
Analysis/include/Luau/Module.h
View file

@ -2,6 +2,7 @@
#pragma once
#include "Luau/Error.h"
#include "Luau/Linter.h"
#include "Luau/FileResolver.h"
#include "Luau/ParseOptions.h"
#include "Luau/ParseResult.h"
@ -88,6 +89,7 @@ struct Module
std::unordered_map<Name, TypeId> declaredGlobals;
ErrorVec errors;
LintResult lintResult;
Mode mode;
SourceCode::Type type;
bool timeout = false;

6
Analysis/include/Luau/Normalize.h
View file

@ -19,6 +19,8 @@ using ModulePtr = std::shared_ptr<Module>;
bool isSubtype(TypeId subTy, TypeId superTy, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice);
bool isSubtype(TypePackId subTy, TypePackId superTy, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice);
bool isConsistentSubtype(TypeId subTy, TypeId superTy, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice);
bool isConsistentSubtype(TypePackId subTy, TypePackId superTy, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice);
class TypeIds
{
@ -203,7 +205,7 @@ struct NormalizedFunctionType
};
// A normalized generic/free type is a union, where each option is of the form (X & T) where
// * X is either a free type or a generic
// * X is either a free type, a generic or a blocked type.
// * T is a normalized type.
struct NormalizedType;
using NormalizedTyvars = std::unordered_map<TypeId, std::unique_ptr<NormalizedType>>;
@ -214,7 +216,7 @@ bool isInhabited_DEPRECATED(const NormalizedType& norm);
// * P is a union of primitive types (including singletons, classes and the error type)
// * T is a union of table types
// * F is a union of an intersection of function types
// * G is a union of generic/free normalized types, intersected with a normalized type
// * G is a union of generic/free/blocked types, intersected with a normalized type
struct NormalizedType
{
// The top part of the type.

1
Analysis/include/Luau/Scope.h
View file

@ -66,6 +66,7 @@ struct Scope
RefinementMap refinements;
DenseHashMap<const Def*, TypeId> dcrRefinements{nullptr};
void inheritRefinements(const ScopePtr& childScope);
// For mutually recursive type aliases, it's important that
// they use the same types for the same names.

2
Analysis/include/Luau/Type.h
View file

@ -102,7 +102,7 @@ struct BlockedType
BlockedType();
int index;
static int nextIndex;
static int DEPRECATED_nextIndex;
};
struct PrimitiveType

43
Analysis/include/Luau/TypeInfer.h
View file

@ -2,14 +2,15 @@
#pragma once
#include "Luau/Anyification.h"
#include "Luau/Predicate.h"
#include "Luau/ControlFlow.h"
#include "Luau/Error.h"
#include "Luau/Module.h"
#include "Luau/Symbol.h"
#include "Luau/Predicate.h"
#include "Luau/Substitution.h"
#include "Luau/Symbol.h"
#include "Luau/TxnLog.h"
#include "Luau/TypePack.h"
#include "Luau/Type.h"
#include "Luau/TypePack.h"
#include "Luau/Unifier.h"
#include "Luau/UnifierSharedState.h"
@ -87,28 +88,28 @@ struct TypeChecker
std::vector<std::pair<Location, ScopePtr>> getScopes() const;
void check(const ScopePtr& scope, const AstStat& statement);
void check(const ScopePtr& scope, const AstStatBlock& statement);
void check(const ScopePtr& scope, const AstStatIf& statement);
void check(const ScopePtr& scope, const AstStatWhile& statement);
void check(const ScopePtr& scope, const AstStatRepeat& statement);
void check(const ScopePtr& scope, const AstStatReturn& return_);
void check(const ScopePtr& scope, const AstStatAssign& assign);
void check(const ScopePtr& scope, const AstStatCompoundAssign& assign);
void check(const ScopePtr& scope, const AstStatLocal& local);
void check(const ScopePtr& scope, const AstStatFor& local);
void check(const ScopePtr& scope, const AstStatForIn& forin);
void check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatFunction& function);
void check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatLocalFunction& function);
void check(const ScopePtr& scope, const AstStatTypeAlias& typealias);
void check(const ScopePtr& scope, const AstStatDeclareClass& declaredClass);
void check(const ScopePtr& scope, const AstStatDeclareFunction& declaredFunction);
ControlFlow check(const ScopePtr& scope, const AstStat& statement);
ControlFlow check(const ScopePtr& scope, const AstStatBlock& statement);
ControlFlow check(const ScopePtr& scope, const AstStatIf& statement);
ControlFlow check(const ScopePtr& scope, const AstStatWhile& statement);
ControlFlow check(const ScopePtr& scope, const AstStatRepeat& statement);
ControlFlow check(const ScopePtr& scope, const AstStatReturn& return_);
ControlFlow check(const ScopePtr& scope, const AstStatAssign& assign);
ControlFlow check(const ScopePtr& scope, const AstStatCompoundAssign& assign);
ControlFlow check(const ScopePtr& scope, const AstStatLocal& local);
ControlFlow check(const ScopePtr& scope, const AstStatFor& local);
ControlFlow check(const ScopePtr& scope, const AstStatForIn& forin);
ControlFlow check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatFunction& function);
ControlFlow check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatLocalFunction& function);
ControlFlow check(const ScopePtr& scope, const AstStatTypeAlias& typealias);
ControlFlow check(const ScopePtr& scope, const AstStatDeclareClass& declaredClass);
ControlFlow check(const ScopePtr& scope, const AstStatDeclareFunction& declaredFunction);
void prototype(const ScopePtr& scope, const AstStatTypeAlias& typealias, int subLevel = 0);
void prototype(const ScopePtr& scope, const AstStatDeclareClass& declaredClass);
void checkBlock(const ScopePtr& scope, const AstStatBlock& statement);
void checkBlockWithoutRecursionCheck(const ScopePtr& scope, const AstStatBlock& statement);
ControlFlow checkBlock(const ScopePtr& scope, const AstStatBlock& statement);
ControlFlow checkBlockWithoutRecursionCheck(const ScopePtr& scope, const AstStatBlock& statement);
void checkBlockTypeAliases(const ScopePtr& scope, std::vector<AstStat*>& sorted);
WithPredicate<TypeId> checkExpr(

2
Analysis/include/Luau/Unifiable.h
View file

@ -81,6 +81,8 @@ namespace Luau::Unifiable
using Name = std::string;
int freshIndex();
struct Free
{
explicit Free(TypeLevel level);

3
Analysis/include/Luau/Unifier.h
View file

@ -58,6 +58,7 @@ struct Unifier
NotNull<Scope> scope; // const Scope maybe
TxnLog log;
bool failure = false;
ErrorVec errors;
Location location;
Variance variance = Covariant;
@ -93,7 +94,7 @@ private:
// Traverse the two types provided and block on any BlockedTypes we find.
// Returns true if any types were blocked on.
bool blockOnBlockedTypes(TypeId subTy, TypeId superTy);
bool DEPRECATED_blockOnBlockedTypes(TypeId subTy, TypeId superTy);
void tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionType* uv, bool cacheEnabled, bool isFunctionCall);
void tryUnifyTypeWithIntersection(TypeId subTy, TypeId superTy, const IntersectionType* uv);

164
Analysis/src/ConstraintGraphBuilder.cpp
View file

@ -5,6 +5,7 @@
#include "Luau/Breadcrumb.h"
#include "Luau/Common.h"
#include "Luau/Constraint.h"
#include "Luau/ControlFlow.h"
#include "Luau/DcrLogger.h"
#include "Luau/ModuleResolver.h"
#include "Luau/RecursionCounter.h"
@ -22,6 +23,7 @@ LUAU_FASTFLAG(LuauNegatedClassTypes);
namespace Luau
{
bool doesCallError(const AstExprCall* call); // TypeInfer.cpp
const AstStat* getFallthrough(const AstStat* node); // TypeInfer.cpp
static std::optional<AstExpr*> matchRequire(const AstExprCall& call)
@ -344,14 +346,14 @@ void ConstraintGraphBuilder::visit(AstStatBlock* block)
logger->captureGenerationModule(module);
}
void ConstraintGraphBuilder::visitBlockWithoutChildScope(const ScopePtr& scope, AstStatBlock* block)
ControlFlow ConstraintGraphBuilder::visitBlockWithoutChildScope(const ScopePtr& scope, AstStatBlock* block)
{
RecursionCounter counter{&recursionCount};
if (recursionCount >= FInt::LuauCheckRecursionLimit)
{
reportCodeTooComplex(block->location);
return;
return ControlFlow::None;
}
std::unordered_map<Name, Location> aliasDefinitionLocations;
@ -396,59 +398,77 @@ void ConstraintGraphBuilder::visitBlockWithoutChildScope(const ScopePtr& scope,
}
}
std::optional<ControlFlow> firstControlFlow;
for (AstStat* stat : block->body)
visit(scope, stat);
{
ControlFlow cf = visit(scope, stat);
if (cf != ControlFlow::None && !firstControlFlow)
firstControlFlow = cf;
}
return firstControlFlow.value_or(ControlFlow::None);
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStat* stat)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStat* stat)
{
RecursionLimiter limiter{&recursionCount, FInt::LuauCheckRecursionLimit};
if (auto s = stat->as<AstStatBlock>())
visit(scope, s);
return visit(scope, s);
else if (auto i = stat->as<AstStatIf>())
visit(scope, i);
return visit(scope, i);
else if (auto s = stat->as<AstStatWhile>())
visit(scope, s);
return visit(scope, s);
else if (auto s = stat->as<AstStatRepeat>())
visit(scope, s);
return visit(scope, s);
else if (stat->is<AstStatBreak>() || stat->is<AstStatContinue>())
{
// Nothing
return ControlFlow::None; // TODO: ControlFlow::Break/Continue
}
else if (auto r = stat->as<AstStatReturn>())
visit(scope, r);
return visit(scope, r);
else if (auto e = stat->as<AstStatExpr>())
{
checkPack(scope, e->expr);
if (auto call = e->expr->as<AstExprCall>(); call && doesCallError(call))
return ControlFlow::Throws;
return ControlFlow::None;
}
else if (auto s = stat->as<AstStatLocal>())
visit(scope, s);
return visit(scope, s);
else if (auto s = stat->as<AstStatFor>())
visit(scope, s);
return visit(scope, s);
else if (auto s = stat->as<AstStatForIn>())
visit(scope, s);
return visit(scope, s);
else if (auto a = stat->as<AstStatAssign>())
visit(scope, a);
return visit(scope, a);
else if (auto a = stat->as<AstStatCompoundAssign>())
visit(scope, a);
return visit(scope, a);
else if (auto f = stat->as<AstStatFunction>())
visit(scope, f);
return visit(scope, f);
else if (auto f = stat->as<AstStatLocalFunction>())
visit(scope, f);
return visit(scope, f);
else if (auto a = stat->as<AstStatTypeAlias>())
visit(scope, a);
return visit(scope, a);
else if (auto s = stat->as<AstStatDeclareGlobal>())
visit(scope, s);
return visit(scope, s);
else if (auto s = stat->as<AstStatDeclareFunction>())
visit(scope, s);
return visit(scope, s);
else if (auto s = stat->as<AstStatDeclareClass>())
visit(scope, s);
return visit(scope, s);
else if (auto s = stat->as<AstStatError>())
visit(scope, s);
return visit(scope, s);
else
{
LUAU_ASSERT(0 && "Internal error: Unknown AstStat type");
return ControlFlow::None;
}
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocal* local)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocal* local)
{
std::vector<TypeId> varTypes;
varTypes.reserve(local->vars.size);
@ -534,7 +554,7 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocal* local)
}
}
if (local->vars.size == 1 && local->values.size == 1 && firstValueType)
if (local->vars.size == 1 && local->values.size == 1 && firstValueType && scope.get() == rootScope)
{
AstLocal* var = local->vars.data[0];
AstExpr* value = local->values.data[0];
@ -592,9 +612,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocal* local)
}
}
}
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatFor* for_)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatFor* for_)
{
TypeId annotationTy = builtinTypes->numberType;
if (for_->var->annotation)
@ -619,9 +641,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatFor* for_)
forScope->dcrRefinements[bc->def] = annotationTy;
visit(forScope, for_->body);
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatForIn* forIn)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatForIn* forIn)
{
ScopePtr loopScope = childScope(forIn, scope);
@ -645,27 +669,33 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatForIn* forIn)
addConstraint(loopScope, getLocation(forIn->values), IterableConstraint{iterator, variablePack});
visit(loopScope, forIn->body);
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatWhile* while_)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatWhile* while_)
{
check(scope, while_->condition);
ScopePtr whileScope = childScope(while_, scope);
visit(whileScope, while_->body);
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatRepeat* repeat)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatRepeat* repeat)
{
ScopePtr repeatScope = childScope(repeat, scope);
visitBlockWithoutChildScope(repeatScope, repeat->body);
check(repeatScope, repeat->condition);
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocalFunction* function)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocalFunction* function)
{
// Local
// Global
@ -699,9 +729,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatLocalFunction*
});
addConstraint(scope, std::move(c));
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatFunction* function)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatFunction* function)
{
// Name could be AstStatLocal, AstStatGlobal, AstStatIndexName.
// With or without self
@ -779,9 +811,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatFunction* funct
});
addConstraint(scope, std::move(c));
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatReturn* ret)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatReturn* ret)
{
// At this point, the only way scope->returnType should have anything
// interesting in it is if the function has an explicit return annotation.
@ -793,13 +827,18 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatReturn* ret)
TypePackId exprTypes = checkPack(scope, ret->list, expectedTypes).tp;
addConstraint(scope, ret->location, PackSubtypeConstraint{exprTypes, scope->returnType});
return ControlFlow::Returns;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatBlock* block)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatBlock* block)
{
ScopePtr innerScope = childScope(block, scope);
visitBlockWithoutChildScope(innerScope, block);
ControlFlow flow = visitBlockWithoutChildScope(innerScope, block);
scope->inheritRefinements(innerScope);
return flow;
}
static void bindFreeType(TypeId a, TypeId b)
@ -819,7 +858,7 @@ static void bindFreeType(TypeId a, TypeId b)
asMutable(b)->ty.emplace<BoundType>(a);
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatAssign* assign)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatAssign* assign)
{
std::vector<TypeId> varTypes = checkLValues(scope, assign->vars);
@ -839,9 +878,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatAssign* assign)
TypePackId varPack = arena->addTypePack({varTypes});
addConstraint(scope, assign->location, PackSubtypeConstraint{exprPack, varPack});
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatCompoundAssign* assign)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatCompoundAssign* assign)
{
// We need to tweak the BinaryConstraint that we emit, so we cannot use the
// strategy of falsifying an AST fragment.
@ -852,23 +893,34 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatCompoundAssign*
addConstraint(scope, assign->location,
BinaryConstraint{assign->op, varTy, valueTy, resultType, assign, &module->astOriginalCallTypes, &module->astOverloadResolvedTypes});
addConstraint(scope, assign->location, SubtypeConstraint{resultType, varTy});
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatIf* ifStatement)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatIf* ifStatement)
{
ScopePtr condScope = childScope(ifStatement->condition, scope);
RefinementId refinement = check(condScope, ifStatement->condition, std::nullopt).refinement;
RefinementId refinement = check(scope, ifStatement->condition, std::nullopt).refinement;
ScopePtr thenScope = childScope(ifStatement->thenbody, scope);
applyRefinements(thenScope, ifStatement->condition->location, refinement);
visit(thenScope, ifStatement->thenbody);
ScopePtr elseScope = childScope(ifStatement->elsebody ? ifStatement->elsebody : ifStatement, scope);
applyRefinements(elseScope, ifStatement->elseLocation.value_or(ifStatement->condition->location), refinementArena.negation(refinement));
ControlFlow thencf = visit(thenScope, ifStatement->thenbody);
ControlFlow elsecf = ControlFlow::None;
if (ifStatement->elsebody)
{
ScopePtr elseScope = childScope(ifStatement->elsebody, scope);
applyRefinements(elseScope, ifStatement->elseLocation.value_or(ifStatement->condition->location), refinementArena.negation(refinement));
visit(elseScope, ifStatement->elsebody);
}
elsecf = visit(elseScope, ifStatement->elsebody);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && elsecf == ControlFlow::None)
scope->inheritRefinements(elseScope);
else if (thencf == ControlFlow::None && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
scope->inheritRefinements(thenScope);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
return ControlFlow::Returns;
else
return ControlFlow::None;
}
static bool occursCheck(TypeId needle, TypeId haystack)
@ -890,7 +942,7 @@ static bool occursCheck(TypeId needle, TypeId haystack)
return false;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatTypeAlias* alias)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatTypeAlias* alias)
{
ScopePtr* defnScope = astTypeAliasDefiningScopes.find(alias);
@ -904,7 +956,7 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatTypeAlias* alia
// case we just skip over it.
auto bindingIt = typeBindings->find(alias->name.value);
if (bindingIt == typeBindings->end() || defnScope == nullptr)
return;
return ControlFlow::None;
TypeId ty = resolveType(*defnScope, alias->type, /* inTypeArguments */ false);
@ -935,9 +987,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatTypeAlias* alia
std::move(typeParams),
std::move(typePackParams),
});
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareGlobal* global)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareGlobal* global)
{
LUAU_ASSERT(global->type);
@ -949,6 +1003,8 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareGlobal*
BreadcrumbId bc = dfg->getBreadcrumb(global);
rootScope->dcrRefinements[bc->def] = globalTy;
return ControlFlow::None;
}
static bool isMetamethod(const Name& name)
@ -958,7 +1014,7 @@ static bool isMetamethod(const Name& name)
name == "__metatable" || name == "__eq" || name == "__lt" || name == "__le" || name == "__mode" || name == "__iter" || name == "__len";
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareClass* declaredClass)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareClass* declaredClass)
{
std::optional<TypeId> superTy = FFlag::LuauNegatedClassTypes ? std::make_optional(builtinTypes->classType) : std::nullopt;
if (declaredClass->superName)
@ -969,7 +1025,7 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareClass* d
if (!lookupType)
{
reportError(declaredClass->location, UnknownSymbol{superName, UnknownSymbol::Type});
return;
return ControlFlow::None;
}
// We don't have generic classes, so this assertion _should_ never be hit.
@ -981,7 +1037,7 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareClass* d
reportError(declaredClass->location,
GenericError{format("Cannot use non-class type '%s' as a superclass of class '%s'", superName.c_str(), declaredClass->name.value)});
return;
return ControlFlow::None;
}
}
@ -1056,9 +1112,11 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareClass* d
}
}
}
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareFunction* global)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareFunction* global)
{
std::vector<std::pair<Name, GenericTypeDefinition>> generics = createGenerics(scope, global->generics);
std::vector<std::pair<Name, GenericTypePackDefinition>> genericPacks = createGenericPacks(scope, global->genericPacks);
@ -1097,14 +1155,18 @@ void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatDeclareFunction
BreadcrumbId bc = dfg->getBreadcrumb(global);
rootScope->dcrRefinements[bc->def] = fnType;
return ControlFlow::None;
}
void ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatError* error)
ControlFlow ConstraintGraphBuilder::visit(const ScopePtr& scope, AstStatError* error)
{
for (AstStat* stat : error->statements)
visit(scope, stat);
for (AstExpr* expr : error->expressions)
check(scope, expr);
return ControlFlow::None;
}
InferencePack ConstraintGraphBuilder::checkPack(

67
Analysis/src/ConstraintSolver.cpp
View file

@ -1273,19 +1273,11 @@ bool ConstraintSolver::tryDispatch(const FunctionCallConstraint& c, NotNull<cons
auto ic = pushConstraintGreedy(InstantiationConstraint{instantiatedTy, fn});
auto sc = pushConstraintGreedy(SubtypeConstraint{instantiatedTy, inferredTy});
// Anything that is blocked on this constraint must also be blocked on our
// synthesized constraints.
auto blockedIt = blocked.find(constraint.get());
if (blockedIt != blocked.end())
{
for (const auto& blockedConstraint : blockedIt->second)
{
if (ic)
block(NotNull{ic}, blockedConstraint);
if (sc)
block(NotNull{sc}, blockedConstraint);
}
}
if (ic)
inheritBlocks(constraint, NotNull{ic});
if (sc)
inheritBlocks(constraint, NotNull{sc});
unblock(c.result);
return true;
@ -1330,7 +1322,7 @@ bool ConstraintSolver::tryDispatch(const HasPropConstraint& c, NotNull<const Con
return false;
}
asMutable(c.resultType)->ty.emplace<BoundType>(result.value_or(builtinTypes->errorRecoveryType()));
asMutable(c.resultType)->ty.emplace<BoundType>(result.value_or(builtinTypes->anyType));
unblock(c.resultType);
return true;
}
@ -1796,13 +1788,23 @@ bool ConstraintSolver::tryDispatchIterableFunction(
return false;
}
const TypeId firstIndex = isNil(firstIndexTy) ? arena->freshType(constraint->scope) // FIXME: Surely this should be a union (free | nil)
: firstIndexTy;
TypeId firstIndex;
TypeId retIndex;
if (isNil(firstIndexTy) || isOptional(firstIndexTy))
{
firstIndex = arena->addType(UnionType{{arena->freshType(constraint->scope), builtinTypes->nilType}});
retIndex = firstIndex;
}
else
{
firstIndex = firstIndexTy;
retIndex = arena->addType(UnionType{{firstIndexTy, builtinTypes->nilType}});
}
// nextTy : (tableTy, indexTy?) -> (indexTy?, valueTailTy...)
const TypePackId nextArgPack = arena->addTypePack({tableTy, arena->addType(UnionType{{firstIndex, builtinTypes->nilType}})});
const TypePackId nextArgPack = arena->addTypePack({tableTy, firstIndex});
const TypePackId valueTailTy = arena->addTypePack(FreeTypePack{constraint->scope});
const TypePackId nextRetPack = arena->addTypePack(TypePack{{firstIndex}, valueTailTy});
const TypePackId nextRetPack = arena->addTypePack(TypePack{{retIndex}, valueTailTy});
const TypeId expectedNextTy = arena->addType(FunctionType{TypeLevel{}, constraint->scope, nextArgPack, nextRetPack});
unify(nextTy, expectedNextTy, constraint->scope);
@ -1825,7 +1827,8 @@ bool ConstraintSolver::tryDispatchIterableFunction(
modifiedNextRetHead.push_back(*it);
TypePackId modifiedNextRetPack = arena->addTypePack(std::move(modifiedNextRetHead), it.tail());
pushConstraint(constraint->scope, constraint->location, PackSubtypeConstraint{c.variables, modifiedNextRetPack});
auto psc = pushConstraint(constraint->scope, constraint->location, PackSubtypeConstraint{c.variables, modifiedNextRetPack});
inheritBlocks(constraint, psc);
return true;
}
@ -1883,7 +1886,17 @@ std::pair<std::vector<TypeId>, std::optional<TypeId>> ConstraintSolver::lookupTa
TypeId indexType = follow(indexProp->second.type);
if (auto ft = get<FunctionType>(indexType))
return {{}, first(ft->retTypes)};
{
TypePack rets = extendTypePack(*arena, builtinTypes, ft->retTypes, 1);
if (1 == rets.head.size())
return {{}, rets.head[0]};
else
{
// This should probably be an error: We need the first result of the MT.__index method,
// but it returns 0 values. See CLI-68672
return {{}, builtinTypes->nilType};
}
}
else
return lookupTableProp(indexType, propName, seen);
}
@ -2009,6 +2022,20 @@ bool ConstraintSolver::block(TypePackId target, NotNull<const Constraint> constr
return false;
}
void ConstraintSolver::inheritBlocks(NotNull<const Constraint> source, NotNull<const Constraint> addition)
{
// Anything that is blocked on this constraint must also be blocked on our
// synthesized constraints.
auto blockedIt = blocked.find(source.get());
if (blockedIt != blocked.end())
{
for (const auto& blockedConstraint : blockedIt->second)
{
block(addition, blockedConstraint);
}
}
}
struct Blocker : TypeOnceVisitor
{
NotNull<ConstraintSolver> solver;

91
Analysis/src/Frontend.cpp
View file

@ -29,6 +29,7 @@ LUAU_FASTINT(LuauTypeInferRecursionLimit)
LUAU_FASTINT(LuauTarjanChildLimit)
LUAU_FASTFLAG(LuauInferInNoCheckMode)
LUAU_FASTFLAGVARIABLE(LuauKnowsTheDataModel3, false)
LUAU_FASTFLAGVARIABLE(LuauLintInTypecheck, false)
LUAU_FASTINTVARIABLE(LuauAutocompleteCheckTimeoutMs, 100)
LUAU_FASTFLAGVARIABLE(DebugLuauDeferredConstraintResolution, false)
LUAU_FASTFLAGVARIABLE(LuauDefinitionFileSourceModule, false)
@ -330,7 +331,7 @@ std::optional<std::string> pathExprToModuleName(const ModuleName& currentModuleN
namespace
{
ErrorVec accumulateErrors(
static ErrorVec accumulateErrors(
const std::unordered_map<ModuleName, SourceNode>& sourceNodes, const std::unordered_map<ModuleName, ModulePtr>& modules, const ModuleName& name)
{
std::unordered_set<ModuleName> seen;
@ -375,6 +376,25 @@ ErrorVec accumulateErrors(
return result;
}
static void filterLintOptions(LintOptions& lintOptions, const std::vector<HotComment>& hotcomments, Mode mode)
{
LUAU_ASSERT(FFlag::LuauLintInTypecheck);
uint64_t ignoreLints = LintWarning::parseMask(hotcomments);
lintOptions.warningMask &= ~ignoreLints;
if (mode != Mode::NoCheck)
{
lintOptions.disableWarning(Luau::LintWarning::Code_UnknownGlobal);
}
if (mode == Mode::Strict)
{
lintOptions.disableWarning(Luau::LintWarning::Code_ImplicitReturn);
}
}
// Given a source node (start), find all requires that start a transitive dependency path that ends back at start
// For each such path, record the full path and the location of the require in the starting module.
// Note that this is O(V^2) for a fully connected graph and produces O(V) paths of length O(V)
@ -514,8 +534,24 @@ CheckResult Frontend::check(const ModuleName& name, std::optional<FrontendOption
throw InternalCompilerError("Frontend::modules does not have data for " + name, name);
}
return CheckResult{
accumulateErrors(sourceNodes, frontendOptions.forAutocomplete ? moduleResolverForAutocomplete.modules : moduleResolver.modules, name)};
if (FFlag::LuauLintInTypecheck)
{
std::unordered_map<ModuleName, ModulePtr>& modules =
frontendOptions.forAutocomplete ? moduleResolverForAutocomplete.modules : moduleResolver.modules;
checkResult.errors = accumulateErrors(sourceNodes, modules, name);
// Get lint result only for top checked module
if (auto it = modules.find(name); it != modules.end())
checkResult.lintResult = it->second->lintResult;
return checkResult;
}
else
{
return CheckResult{accumulateErrors(
sourceNodes, frontendOptions.forAutocomplete ? moduleResolverForAutocomplete.modules : moduleResolver.modules, name)};
}
}
std::vector<ModuleName> buildQueue;
@ -579,7 +615,7 @@ CheckResult Frontend::check(const ModuleName& name, std::optional<FrontendOption
else
typeCheckerForAutocomplete.unifierIterationLimit = std::nullopt;
ModulePtr moduleForAutocomplete = FFlag::DebugLuauDeferredConstraintResolution
ModulePtr moduleForAutocomplete = (FFlag::DebugLuauDeferredConstraintResolution && mode == Mode::Strict)
? check(sourceModule, mode, requireCycles, /*forAutocomplete*/ true, /*recordJsonLog*/ false)
: typeCheckerForAutocomplete.check(sourceModule, Mode::Strict, environmentScope);
@ -609,8 +645,9 @@ CheckResult Frontend::check(const ModuleName& name, std::optional<FrontendOption
const bool recordJsonLog = FFlag::DebugLuauLogSolverToJson && moduleName == name;
ModulePtr module = FFlag::DebugLuauDeferredConstraintResolution ? check(sourceModule, mode, requireCycles, /*forAutocomplete*/ false, recordJsonLog)
: typeChecker.check(sourceModule, mode, environmentScope);
ModulePtr module = (FFlag::DebugLuauDeferredConstraintResolution && mode == Mode::Strict)
? check(sourceModule, mode, requireCycles, /*forAutocomplete*/ false, recordJsonLog)
: typeChecker.check(sourceModule, mode, environmentScope);
stats.timeCheck += getTimestamp() - timestamp;
stats.filesStrict += mode == Mode::Strict;
@ -619,6 +656,28 @@ CheckResult Frontend::check(const ModuleName& name, std::optional<FrontendOption
if (module == nullptr)
throw InternalCompilerError("Frontend::check produced a nullptr module for " + moduleName, moduleName);
if (FFlag::DebugLuauDeferredConstraintResolution && mode == Mode::NoCheck)
module->errors.clear();
if (frontendOptions.runLintChecks)
{
LUAU_TIMETRACE_SCOPE("lint", "Frontend");
LUAU_ASSERT(FFlag::LuauLintInTypecheck);
LintOptions lintOptions = frontendOptions.enabledLintWarnings.value_or(config.enabledLint);
filterLintOptions(lintOptions, sourceModule.hotcomments, mode);
double timestamp = getTimestamp();
std::vector<LintWarning> warnings =
Luau::lint(sourceModule.root, *sourceModule.names, environmentScope, module.get(), sourceModule.hotcomments, lintOptions);
stats.timeLint += getTimestamp() - timestamp;
module->lintResult = classifyLints(warnings, config);
}
if (!frontendOptions.retainFullTypeGraphs)
{
// copyErrors needs to allocate into interfaceTypes as it copies
@ -665,6 +724,16 @@ CheckResult Frontend::check(const ModuleName& name, std::optional<FrontendOption
sourceNode.dirtyModule = false;
}
if (FFlag::LuauLintInTypecheck)
{
// Get lint result only for top checked module
std::unordered_map<ModuleName, ModulePtr>& modules =
frontendOptions.forAutocomplete ? moduleResolverForAutocomplete.modules : moduleResolver.modules;
if (auto it = modules.find(name); it != modules.end())
checkResult.lintResult = it->second->lintResult;
}
return checkResult;
}
@ -793,8 +862,10 @@ ScopePtr Frontend::getModuleEnvironment(const SourceModule& module, const Config
return result;
}
LintResult Frontend::lint(const ModuleName& name, std::optional<Luau::LintOptions> enabledLintWarnings)
LintResult Frontend::lint_DEPRECATED(const ModuleName& name, std::optional<Luau::LintOptions> enabledLintWarnings)
{
LUAU_ASSERT(!FFlag::LuauLintInTypecheck);
LUAU_TIMETRACE_SCOPE("Frontend::lint", "Frontend");
LUAU_TIMETRACE_ARGUMENT("name", name.c_str());
@ -803,11 +874,13 @@ LintResult Frontend::lint(const ModuleName& name, std::optional<Luau::LintOption
if (!sourceModule)
return LintResult{}; // FIXME: We really should do something a bit more obvious when a file is too broken to lint.
return lint(*sourceModule, enabledLintWarnings);
return lint_DEPRECATED(*sourceModule, enabledLintWarnings);
}
LintResult Frontend::lint(const SourceModule& module, std::optional<Luau::LintOptions> enabledLintWarnings)
LintResult Frontend::lint_DEPRECATED(const SourceModule& module, std::optional<Luau::LintOptions> enabledLintWarnings)
{
LUAU_ASSERT(!FFlag::LuauLintInTypecheck);
LUAU_TIMETRACE_SCOPE("Frontend::lint", "Frontend");
LUAU_TIMETRACE_ARGUMENT("module", module.name.c_str());

55
Analysis/src/Normalize.cpp
View file

@ -20,8 +20,10 @@ LUAU_FASTINTVARIABLE(LuauNormalizeCacheLimit, 100000);
LUAU_FASTFLAGVARIABLE(LuauNegatedClassTypes, false);
LUAU_FASTFLAGVARIABLE(LuauNegatedFunctionTypes, false);
LUAU_FASTFLAGVARIABLE(LuauNegatedTableTypes, false);
LUAU_FASTFLAGVARIABLE(LuauNormalizeBlockedTypes, false);
LUAU_FASTFLAG(DebugLuauDeferredConstraintResolution)
LUAU_FASTFLAG(LuauUninhabitedSubAnything2)
LUAU_FASTFLAG(LuauTransitiveSubtyping)
namespace Luau
{
@ -325,6 +327,8 @@ static int tyvarIndex(TypeId ty)
return gtv->index;
else if (const FreeType* ftv = get<FreeType>(ty))
return ftv->index;
else if (const BlockedType* btv = get<BlockedType>(ty))
return btv->index;
else
return 0;
}
@ -529,7 +533,7 @@ static bool areNormalizedClasses(const NormalizedClassType& tys)
static bool isPlainTyvar(TypeId ty)
{
return (get<FreeType>(ty) || get<GenericType>(ty));
return (get<FreeType>(ty) || get<GenericType>(ty) || (FFlag::LuauNormalizeBlockedTypes && get<BlockedType>(ty)));
}
static bool isNormalizedTyvar(const NormalizedTyvars& tyvars)
@ -1271,6 +1275,8 @@ void Normalizer::unionTables(TypeIds& heres, const TypeIds& theres)
bool Normalizer::unionNormals(NormalizedType& here, const NormalizedType& there, int ignoreSmallerTyvars)
{
TypeId tops = unionOfTops(here.tops, there.tops);
if (FFlag::LuauTransitiveSubtyping && get<UnknownType>(tops) && (get<ErrorType>(here.errors) || get<ErrorType>(there.errors)))
tops = builtinTypes->anyType;
if (!get<NeverType>(tops))
{
clearNormal(here);
@ -1341,12 +1347,21 @@ bool Normalizer::unionNormalWithTy(NormalizedType& here, TypeId there, int ignor
if (get<AnyType>(there) || get<UnknownType>(there))
{
TypeId tops = unionOfTops(here.tops, there);
if (FFlag::LuauTransitiveSubtyping && get<UnknownType>(tops) && get<ErrorType>(here.errors))
tops = builtinTypes->anyType;
clearNormal(here);
here.tops = tops;
return true;
}
else if (get<NeverType>(there) || !get<NeverType>(here.tops))
else if (!FFlag::LuauTransitiveSubtyping && (get<NeverType>(there) || !get<NeverType>(here.tops)))
return true;
else if (FFlag::LuauTransitiveSubtyping && (get<NeverType>(there) || get<AnyType>(here.tops)))
return true;
else if (FFlag::LuauTransitiveSubtyping && get<ErrorType>(there) && get<UnknownType>(here.tops))
{
here.tops = builtinTypes->anyType;
return true;
}
else if (const UnionType* utv = get<UnionType>(there))
{
for (UnionTypeIterator it = begin(utv); it != end(utv); ++it)
@ -1363,7 +1378,9 @@ bool Normalizer::unionNormalWithTy(NormalizedType& here, TypeId there, int ignor
return false;
return unionNormals(here, norm);
}
else if (get<GenericType>(there) || get<FreeType>(there))
else if (FFlag::LuauTransitiveSubtyping && get<UnknownType>(here.tops))
return true;
else if (get<GenericType>(there) || get<FreeType>(there) || (FFlag::LuauNormalizeBlockedTypes && get<BlockedType>(there)))
{
if (tyvarIndex(there) <= ignoreSmallerTyvars)
return true;
@ -1441,7 +1458,7 @@ bool Normalizer::unionNormalWithTy(NormalizedType& here, TypeId there, int ignor
if (!unionNormals(here, *tn))
return false;
}
else if (get<BlockedType>(there))
else if (!FFlag::LuauNormalizeBlockedTypes && get<BlockedType>(there))
LUAU_ASSERT(!"Internal error: Trying to normalize a BlockedType");
else
LUAU_ASSERT(!"Unreachable");
@ -2527,7 +2544,7 @@ bool Normalizer::intersectNormalWithTy(NormalizedType& here, TypeId there)
return false;
return true;
}
else if (get<GenericType>(there) || get<FreeType>(there))
else if (get<GenericType>(there) || get<FreeType>(there) || (FFlag::LuauNormalizeBlockedTypes && get<BlockedType>(there)))
{
NormalizedType thereNorm{builtinTypes};
NormalizedType topNorm{builtinTypes};
@ -2802,6 +2819,32 @@ TypeId Normalizer::typeFromNormal(const NormalizedType& norm)
}
bool isSubtype(TypeId subTy, TypeId superTy, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice)
{
if (!FFlag::LuauTransitiveSubtyping)
return isConsistentSubtype(subTy, superTy, scope, builtinTypes, ice);
UnifierSharedState sharedState{&ice};
TypeArena arena;
Normalizer normalizer{&arena, builtinTypes, NotNull{&sharedState}};
Unifier u{NotNull{&normalizer}, Mode::Strict, scope, Location{}, Covariant};
u.tryUnify(subTy, superTy);
return !u.failure;
}
bool isSubtype(TypePackId subPack, TypePackId superPack, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice)
{
if (!FFlag::LuauTransitiveSubtyping)
return isConsistentSubtype(subPack, superPack, scope, builtinTypes, ice);
UnifierSharedState sharedState{&ice};
TypeArena arena;
Normalizer normalizer{&arena, builtinTypes, NotNull{&sharedState}};
Unifier u{NotNull{&normalizer}, Mode::Strict, scope, Location{}, Covariant};
u.tryUnify(subPack, superPack);
return !u.failure;
}
bool isConsistentSubtype(TypeId subTy, TypeId superTy, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice)
{
UnifierSharedState sharedState{&ice};
TypeArena arena;
@ -2813,7 +2856,7 @@ bool isSubtype(TypeId subTy, TypeId superTy, NotNull<Scope> scope, NotNull<Built
return ok;
}
bool isSubtype(TypePackId subPack, TypePackId superPack, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice)
bool isConsistentSubtype(TypePackId subPack, TypePackId superPack, NotNull<Scope> scope, NotNull<BuiltinTypes> builtinTypes, InternalErrorReporter& ice)
{
UnifierSharedState sharedState{&ice};
TypeArena arena;

1
Analysis/src/Quantify.cpp
View file

@ -27,7 +27,6 @@ struct Quantifier final : TypeOnceVisitor
explicit Quantifier(TypeLevel level)
: level(level)
{
LUAU_ASSERT(!FFlag::DebugLuauDeferredConstraintResolution);
}
/// @return true if outer encloses inner

22
Analysis/src/Scope.cpp
View file

@ -149,6 +149,28 @@ std::optional<Binding> Scope::linearSearchForBinding(const std::string& name, bo
return std::nullopt;
}
// Updates the `this` scope with the refinements from the `childScope` excluding ones that doesn't exist in `this`.
void Scope::inheritRefinements(const ScopePtr& childScope)
{
if (FFlag::DebugLuauDeferredConstraintResolution)
{
for (const auto& [k, a] : childScope->dcrRefinements)
{
if (lookup(NotNull{k}))
dcrRefinements[k] = a;
}
}
else
{
for (const auto& [k, a] : childScope->refinements)
{
Symbol symbol = getBaseSymbol(k);
if (lookup(symbol))
refinements[k] = a;
}
}
}
bool subsumesStrict(Scope* left, Scope* right)
{
while (right)

5
Analysis/src/Type.cpp
View file

@ -25,6 +25,7 @@ LUAU_FASTINTVARIABLE(LuauTypeMaximumStringifierLength, 500)
LUAU_FASTINTVARIABLE(LuauTableTypeMaximumStringifierLength, 0)
LUAU_FASTINT(LuauTypeInferRecursionLimit)
LUAU_FASTFLAG(LuauInstantiateInSubtyping)
LUAU_FASTFLAG(LuauNormalizeBlockedTypes)
LUAU_FASTFLAGVARIABLE(LuauMatchReturnsOptionalString, false);
namespace Luau
@ -431,11 +432,11 @@ bool hasLength(TypeId ty, DenseHashSet<TypeId>& seen, int* recursionCount)
}
BlockedType::BlockedType()
: index(++nextIndex)
: index(FFlag::LuauNormalizeBlockedTypes ? Unifiable::freshIndex() : ++DEPRECATED_nextIndex)
{
}
int BlockedType::nextIndex = 0;
int BlockedType::DEPRECATED_nextIndex = 0;
PendingExpansionType::PendingExpansionType(
std::optional<AstName> prefix, AstName name, std::vector<TypeId> typeArguments, std::vector<TypePackId> packArguments)

213
Analysis/src/TypeInfer.cpp
View file

@ -43,6 +43,8 @@ LUAU_FASTFLAG(LuauNegatedClassTypes)
LUAU_FASTFLAGVARIABLE(LuauAllowIndexClassParameters, false)
LUAU_FASTFLAG(LuauUninhabitedSubAnything2)
LUAU_FASTFLAGVARIABLE(LuauTypecheckTypeguards, false)
LUAU_FASTFLAGVARIABLE(LuauTinyControlFlowAnalysis, false)
LUAU_FASTFLAGVARIABLE(LuauReducingAndOr, false)
namespace Luau
{
@ -344,42 +346,54 @@ ModulePtr TypeChecker::checkWithoutRecursionCheck(const SourceModule& module, Mo
return std::move(currentModule);
}
void TypeChecker::check(const ScopePtr& scope, const AstStat& program)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStat& program)
{
if (finishTime && TimeTrace::getClock() > *finishTime)
throw TimeLimitError(iceHandler->moduleName);
if (auto block = program.as<AstStatBlock>())
check(scope, *block);
return check(scope, *block);
else if (auto if_ = program.as<AstStatIf>())
check(scope, *if_);
return check(scope, *if_);
else if (auto while_ = program.as<AstStatWhile>())
check(scope, *while_);
return check(scope, *while_);
else if (auto repeat = program.as<AstStatRepeat>())
check(scope, *repeat);
else if (program.is<AstStatBreak>())
return check(scope, *repeat);
else if (program.is<AstStatBreak>() || program.is<AstStatContinue>())
{
} // Nothing to do
else if (program.is<AstStatContinue>())
{
} // Nothing to do
// Nothing to do
return ControlFlow::None;
}
else if (auto return_ = program.as<AstStatReturn>())
check(scope, *return_);
return check(scope, *return_);
else if (auto expr = program.as<AstStatExpr>())
{
checkExprPack(scope, *expr->expr);
if (FFlag::LuauTinyControlFlowAnalysis)
{
if (auto call = expr->expr->as<AstExprCall>(); call && doesCallError(call))
return ControlFlow::Throws;
}
return ControlFlow::None;
}
else if (auto local = program.as<AstStatLocal>())
check(scope, *local);
return check(scope, *local);
else if (auto for_ = program.as<AstStatFor>())
check(scope, *for_);
return check(scope, *for_);
else if (auto forIn = program.as<AstStatForIn>())
check(scope, *forIn);
return check(scope, *forIn);
else if (auto assign = program.as<AstStatAssign>())
check(scope, *assign);
return check(scope, *assign);
else if (auto assign = program.as<AstStatCompoundAssign>())
check(scope, *assign);
return check(scope, *assign);
else if (program.is<AstStatFunction>())
ice("Should not be calling two-argument check() on a function statement", program.location);
else if (program.is<AstStatLocalFunction>())
ice("Should not be calling two-argument check() on a function statement", program.location);
else if (auto typealias = program.as<AstStatTypeAlias>())
check(scope, *typealias);
return check(scope, *typealias);
else if (auto global = program.as<AstStatDeclareGlobal>())
{
TypeId globalType = resolveType(scope, *global->type);
@ -387,11 +401,13 @@ void TypeChecker::check(const ScopePtr& scope, const AstStat& program)
currentModule->declaredGlobals[globalName] = globalType;
currentModule->getModuleScope()->bindings[global->name] = Binding{globalType, global->location};
return ControlFlow::None;
}
else if (auto global = program.as<AstStatDeclareFunction>())
check(scope, *global);
return check(scope, *global);
else if (auto global = program.as<AstStatDeclareClass>())
check(scope, *global);
return check(scope, *global);
else if (auto errorStatement = program.as<AstStatError>())
{
const size_t oldSize = currentModule->errors.size();
@ -405,37 +421,40 @@ void TypeChecker::check(const ScopePtr& scope, const AstStat& program)
// HACK: We want to run typechecking on the contents of the AstStatError, but
// we don't think the type errors will be useful most of the time.
currentModule->errors.resize(oldSize);
return ControlFlow::None;
}
else
ice("Unknown AstStat");
if (finishTime && TimeTrace::getClock() > *finishTime)
throw TimeLimitError(iceHandler->moduleName);
}
// This particular overload is for do...end. If you need to not increase the scope level, use checkBlock directly.
void TypeChecker::check(const ScopePtr& scope, const AstStatBlock& block)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatBlock& block)
{
ScopePtr child = childScope(scope, block.location);
checkBlock(child, block);
ControlFlow flow = checkBlock(child, block);
scope->inheritRefinements(child);
return flow;
}
void TypeChecker::checkBlock(const ScopePtr& scope, const AstStatBlock& block)
ControlFlow TypeChecker::checkBlock(const ScopePtr& scope, const AstStatBlock& block)
{
RecursionCounter _rc(&checkRecursionCount);
if (FInt::LuauCheckRecursionLimit > 0 && checkRecursionCount >= FInt::LuauCheckRecursionLimit)
{
reportErrorCodeTooComplex(block.location);
return;
return ControlFlow::None;
}
try
{
checkBlockWithoutRecursionCheck(scope, block);
return checkBlockWithoutRecursionCheck(scope, block);
}
catch (const RecursionLimitException&)
{
reportErrorCodeTooComplex(block.location);
return;
return ControlFlow::None;
}
}
@ -488,7 +507,7 @@ struct InplaceDemoter : TypeOnceVisitor
}
};
void TypeChecker::checkBlockWithoutRecursionCheck(const ScopePtr& scope, const AstStatBlock& block)
ControlFlow TypeChecker::checkBlockWithoutRecursionCheck(const ScopePtr& scope, const AstStatBlock& block)
{
int subLevel = 0;
@ -528,6 +547,7 @@ void TypeChecker::checkBlockWithoutRecursionCheck(const ScopePtr& scope, const A
}
};
std::optional<ControlFlow> firstFlow;
while (protoIter != sorted.end())
{
// protoIter walks forward
@ -570,7 +590,9 @@ void TypeChecker::checkBlockWithoutRecursionCheck(const ScopePtr& scope, const A
// We do check the current element, so advance checkIter beyond it.
++checkIter;
check(scope, **protoIter);
ControlFlow flow = check(scope, **protoIter);
if (flow != ControlFlow::None && !firstFlow)
firstFlow = flow;
}
else if (auto fun = (*protoIter)->as<AstStatFunction>())
{
@ -631,7 +653,11 @@ void TypeChecker::checkBlockWithoutRecursionCheck(const ScopePtr& scope, const A
scope->bindings[fun->name] = {funTy, fun->name->location};
}
else
check(scope, **protoIter);
{
ControlFlow flow = check(scope, **protoIter);
if (flow != ControlFlow::None && !firstFlow)
firstFlow = flow;
}
++protoIter;
}
@ -643,6 +669,8 @@ void TypeChecker::checkBlockWithoutRecursionCheck(const ScopePtr& scope, const A
}
checkBlockTypeAliases(scope, sorted);
return firstFlow.value_or(ControlFlow::None);
}
LUAU_NOINLINE void TypeChecker::checkBlockTypeAliases(const ScopePtr& scope, std::vector<AstStat*>& sorted)
@ -717,19 +745,45 @@ static std::optional<Predicate> tryGetTypeGuardPredicate(const AstExprBinary& ex
return predicate;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatIf& statement)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatIf& statement)
{
WithPredicate<TypeId> result = checkExpr(scope, *statement.condition);
ScopePtr ifScope = childScope(scope, statement.thenbody->location);
resolve(result.predicates, ifScope, true);
check(ifScope, *statement.thenbody);
ScopePtr thenScope = childScope(scope, statement.thenbody->location);
resolve(result.predicates, thenScope, true);
if (statement.elsebody)
if (FFlag::LuauTinyControlFlowAnalysis)
{
ScopePtr elseScope = childScope(scope, statement.elsebody->location);
ScopePtr elseScope = childScope(scope, statement.elsebody ? statement.elsebody->location : statement.location);
resolve(result.predicates, elseScope, false);
check(elseScope, *statement.elsebody);
ControlFlow thencf = check(thenScope, *statement.thenbody);
ControlFlow elsecf = ControlFlow::None;
if (statement.elsebody)
elsecf = check(elseScope, *statement.elsebody);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && elsecf == ControlFlow::None)
scope->inheritRefinements(elseScope);
else if (thencf == ControlFlow::None && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
scope->inheritRefinements(thenScope);
if (matches(thencf, ControlFlow::Returns | ControlFlow::Throws) && matches(elsecf, ControlFlow::Returns | ControlFlow::Throws))
return ControlFlow::Returns;
else
return ControlFlow::None;
}
else
{
check(thenScope, *statement.thenbody);
if (statement.elsebody)
{
ScopePtr elseScope = childScope(scope, statement.elsebody->location);
resolve(result.predicates, elseScope, false);
check(elseScope, *statement.elsebody);
}
return ControlFlow::None;
}
}
@ -750,22 +804,26 @@ ErrorVec TypeChecker::canUnify(TypePackId subTy, TypePackId superTy, const Scope
return canUnify_(subTy, superTy, scope, location);
}
void TypeChecker::check(const ScopePtr& scope, const AstStatWhile& statement)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatWhile& statement)
{
WithPredicate<TypeId> result = checkExpr(scope, *statement.condition);
ScopePtr whileScope = childScope(scope, statement.body->location);
resolve(result.predicates, whileScope, true);
check(whileScope, *statement.body);
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatRepeat& statement)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatRepeat& statement)
{
ScopePtr repScope = childScope(scope, statement.location);
checkBlock(repScope, *statement.body);
checkExpr(repScope, *statement.condition);
return ControlFlow::None;
}
struct Demoter : Substitution
@ -822,7 +880,7 @@ struct Demoter : Substitution
}
};
void TypeChecker::check(const ScopePtr& scope, const AstStatReturn& return_)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatReturn& return_)
{
std::vector<std::optional<TypeId>> expectedTypes;
expectedTypes.reserve(return_.list.size);
@ -858,10 +916,12 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatReturn& return_)
if (!errors.empty())
currentModule->getModuleScope()->returnType = addTypePack({anyType});
return;
return FFlag::LuauTinyControlFlowAnalysis ? ControlFlow::Returns : ControlFlow::None;
}
unify(retPack, scope->returnType, scope, return_.location, CountMismatch::Context::Return);
return FFlag::LuauTinyControlFlowAnalysis ? ControlFlow::Returns : ControlFlow::None;
}
template<typename Id>
@ -893,7 +953,7 @@ ErrorVec TypeChecker::tryUnify(TypePackId subTy, TypePackId superTy, const Scope
return tryUnify_(subTy, superTy, scope, location);
}
void TypeChecker::check(const ScopePtr& scope, const AstStatAssign& assign)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatAssign& assign)
{
std::vector<std::optional<TypeId>> expectedTypes;
expectedTypes.reserve(assign.vars.size);
@ -993,9 +1053,11 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatAssign& assign)
}
}
}
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatCompoundAssign& assign)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatCompoundAssign& assign)
{
AstExprBinary expr(assign.location, assign.op, assign.var, assign.value);
@ -1005,9 +1067,11 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatCompoundAssign& assi
TypeId result = checkBinaryOperation(scope, expr, left, right);
unify(result, left, scope, assign.location);
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatLocal& local)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatLocal& local)
{
// Important subtlety: A local variable is not in scope while its initializer is being evaluated.
// For instance, you cannot do this:
@ -1144,9 +1208,11 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatLocal& local)
for (const auto& [local, binding] : varBindings)
scope->bindings[local] = binding;
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatFor& expr)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatFor& expr)
{
ScopePtr loopScope = childScope(scope, expr.location);
@ -1169,9 +1235,11 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatFor& expr)
unify(checkExpr(loopScope, *expr.step).type, loopVarType, scope, expr.step->location);
check(loopScope, *expr.body);
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatForIn& forin)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatForIn& forin)
{
ScopePtr loopScope = childScope(scope, forin.location);
@ -1360,9 +1428,11 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatForIn& forin)
unify(retPack, varPack, scope, forin.location);
check(loopScope, *forin.body);
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatFunction& function)
ControlFlow TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatFunction& function)
{
if (auto exprName = function.name->as<AstExprGlobal>())
{
@ -1387,8 +1457,6 @@ void TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funSco
globalBindings[name] = oldBinding;
else
globalBindings[name] = {quantify(funScope, ty, exprName->location), exprName->location};
return;
}
else if (auto name = function.name->as<AstExprLocal>())
{
@ -1397,7 +1465,6 @@ void TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funSco
checkFunctionBody(funScope, ty, *function.func);
scope->bindings[name->local] = {anyIfNonstrict(quantify(funScope, ty, name->local->location)), name->local->location};
return;
}
else if (auto name = function.name->as<AstExprIndexName>())
{
@ -1444,9 +1511,11 @@ void TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funSco
checkFunctionBody(funScope, ty, *function.func);
}
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatLocalFunction& function)
ControlFlow TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funScope, const AstStatLocalFunction& function)
{
Name name = function.name->name.value;
@ -1455,15 +1524,17 @@ void TypeChecker::check(const ScopePtr& scope, TypeId ty, const ScopePtr& funSco
checkFunctionBody(funScope, ty, *function.func);
scope->bindings[function.name] = {quantify(funScope, ty, function.name->location), function.name->location};
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatTypeAlias& typealias)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatTypeAlias& typealias)
{
Name name = typealias.name.value;
// If the alias is missing a name, we can't do anything with it. Ignore it.
if (name == kParseNameError)
return;
return ControlFlow::None;
std::optional<TypeFun> binding;
if (auto it = scope->exportedTypeBindings.find(name); it != scope->exportedTypeBindings.end())
@ -1476,7 +1547,7 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatTypeAlias& typealias
// If the first pass failed (this should mean a duplicate definition), the second pass isn't going to be
// interesting.
if (duplicateTypeAliases.find({typealias.exported, name}))
return;
return ControlFlow::None;
// By now this alias must have been `prototype()`d first.
if (!binding)
@ -1557,6 +1628,8 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatTypeAlias& typealias
if (unify(ty, bindingType, aliasScope, typealias.location))
bindingType = ty;
return ControlFlow::None;
}
void TypeChecker::prototype(const ScopePtr& scope, const AstStatTypeAlias& typealias, int subLevel)
@ -1648,13 +1721,13 @@ void TypeChecker::prototype(const ScopePtr& scope, const AstStatDeclareClass& de
scope->exportedTypeBindings[className] = TypeFun{{}, classTy};
}
void TypeChecker::check(const ScopePtr& scope, const AstStatDeclareClass& declaredClass)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatDeclareClass& declaredClass)
{
Name className(declaredClass.name.value);
// Don't bother checking if the class definition was incorrect
if (incorrectClassDefinitions.find(&declaredClass))
return;
return ControlFlow::None;
std::optional<TypeFun> binding;
if (auto it = scope->exportedTypeBindings.find(className); it != scope->exportedTypeBindings.end())
@ -1721,9 +1794,11 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatDeclareClass& declar
}
}
}
return ControlFlow::None;
}
void TypeChecker::check(const ScopePtr& scope, const AstStatDeclareFunction& global)
ControlFlow TypeChecker::check(const ScopePtr& scope, const AstStatDeclareFunction& global)
{
ScopePtr funScope = childFunctionScope(scope, global.location);
@ -1754,6 +1829,8 @@ void TypeChecker::check(const ScopePtr& scope, const AstStatDeclareFunction& glo
currentModule->declaredGlobals[fnName] = fnType;
currentModule->getModuleScope()->bindings[global.name] = Binding{fnType, global.location};
return ControlFlow::None;
}
WithPredicate<TypeId> TypeChecker::checkExpr(const ScopePtr& scope, const AstExpr& expr, std::optional<TypeId> expectedType, bool forceSingleton)
@ -2785,6 +2862,16 @@ TypeId TypeChecker::checkRelationalOperation(
if (notNever)
{
LUAU_ASSERT(oty);
if (FFlag::LuauReducingAndOr)
{
// Perform a limited form of type reduction for booleans
if (isPrim(*oty, PrimitiveType::Boolean) && get<BooleanSingleton>(get<SingletonType>(follow(rhsType))))
return booleanType;
if (isPrim(rhsType, PrimitiveType::Boolean) && get<BooleanSingleton>(get<SingletonType>(follow(*oty))))
return booleanType;
}
return unionOfTypes(*oty, rhsType, scope, expr.location, false);
}
else
@ -2808,6 +2895,16 @@ TypeId TypeChecker::checkRelationalOperation(
if (notNever)
{
LUAU_ASSERT(oty);
if (FFlag::LuauReducingAndOr)
{
// Perform a limited form of type reduction for booleans
if (isPrim(*oty, PrimitiveType::Boolean) && get<BooleanSingleton>(get<SingletonType>(follow(rhsType))))
return booleanType;
if (isPrim(rhsType, PrimitiveType::Boolean) && get<BooleanSingleton>(get<SingletonType>(follow(*oty))))
return booleanType;
}
return unionOfTypes(*oty, rhsType, scope, expr.location);
}
else

5
Analysis/src/Unifiable.cpp
View file

@ -8,6 +8,11 @@ namespace Unifiable
static int nextIndex = 0;
int freshIndex()
{
return ++nextIndex;
}
Free::Free(TypeLevel level)
: index(++nextIndex)
, level(level)

168
Analysis/src/Unifier.cpp
View file

@ -20,9 +20,11 @@ LUAU_FASTFLAG(LuauErrorRecoveryType)
LUAU_FASTFLAGVARIABLE(LuauInstantiateInSubtyping, false)
LUAU_FASTFLAGVARIABLE(LuauUninhabitedSubAnything2, false)
LUAU_FASTFLAGVARIABLE(LuauMaintainScopesInUnifier, false)
LUAU_FASTFLAGVARIABLE(LuauTransitiveSubtyping, false)
LUAU_FASTFLAGVARIABLE(LuauTinyUnifyNormalsFix, false)
LUAU_FASTFLAG(LuauClassTypeVarsInSubstitution)
LUAU_FASTFLAG(DebugLuauDeferredConstraintResolution)
LUAU_FASTFLAG(LuauNormalizeBlockedTypes)
LUAU_FASTFLAG(LuauNegatedFunctionTypes)
LUAU_FASTFLAG(LuauNegatedClassTypes)
LUAU_FASTFLAG(LuauNegatedTableTypes)
@ -475,16 +477,27 @@ void Unifier::tryUnify_(TypeId subTy, TypeId superTy, bool isFunctionCall, bool
if (log.get<AnyType>(superTy))
return tryUnifyWithAny(subTy, builtinTypes->anyType);
if (log.get<ErrorType>(superTy))
if (!FFlag::LuauTransitiveSubtyping && log.get<ErrorType>(superTy))
return tryUnifyWithAny(subTy, builtinTypes->errorType);
if (log.get<UnknownType>(superTy))
if (!FFlag::LuauTransitiveSubtyping && log.get<UnknownType>(superTy))
return tryUnifyWithAny(subTy, builtinTypes->unknownType);
if (log.get<AnyType>(subTy))
{
if (FFlag::LuauTransitiveSubtyping && normalize)
{
// TODO: there are probably cheaper ways to check if any <: T.
const NormalizedType* superNorm = normalizer->normalize(superTy);
if (!log.get<AnyType>(superNorm->tops))
failure = true;
}
else
failure = true;
return tryUnifyWithAny(superTy, builtinTypes->anyType);
}
if (log.get<ErrorType>(subTy))
if (!FFlag::LuauTransitiveSubtyping && log.get<ErrorType>(subTy))
return tryUnifyWithAny(superTy, builtinTypes->errorType);
if (log.get<NeverType>(subTy))
@ -539,6 +552,35 @@ void Unifier::tryUnify_(TypeId subTy, TypeId superTy, bool isFunctionCall, bool
{
tryUnifyIntersectionWithType(subTy, uv, superTy, cacheEnabled, isFunctionCall);
}
else if (FFlag::LuauTransitiveSubtyping && log.get<AnyType>(subTy))
{
tryUnifyWithAny(superTy, builtinTypes->unknownType);
failure = true;
}
else if (FFlag::LuauTransitiveSubtyping && log.get<ErrorType>(subTy) && log.get<ErrorType>(superTy))
{
// error <: error
}
else if (FFlag::LuauTransitiveSubtyping && log.get<ErrorType>(superTy))
{
tryUnifyWithAny(subTy, builtinTypes->errorType);
failure = true;
}
else if (FFlag::LuauTransitiveSubtyping && log.get<ErrorType>(subTy))
{
tryUnifyWithAny(superTy, builtinTypes->errorType);
failure = true;
}
else if (FFlag::LuauTransitiveSubtyping && log.get<UnknownType>(superTy))
{
// At this point, all the supertypes of `error` have been handled,
// and if `error </: T` then `T <: unknown`.
tryUnifyWithAny(subTy, builtinTypes->unknownType);
}
else if (FFlag::LuauTransitiveSubtyping && log.get<UnknownType>(superTy))
{
tryUnifyWithAny(subTy, builtinTypes->unknownType);
}
else if (log.getMutable<PrimitiveType>(superTy) && log.getMutable<PrimitiveType>(subTy))
tryUnifyPrimitives(subTy, superTy);
@ -611,6 +653,7 @@ void Unifier::tryUnifyUnionWithType(TypeId subTy, const UnionType* subUnion, Typ
{
// A | B <: T if and only if A <: T and B <: T
bool failed = false;
bool errorsSuppressed = true;
std::optional<TypeError> unificationTooComplex;
std::optional<TypeError> firstFailedOption;
@ -626,13 +669,17 @@ void Unifier::tryUnifyUnionWithType(TypeId subTy, const UnionType* subUnion, Typ
if (auto e = hasUnificationTooComplex(innerState.errors))
unificationTooComplex = e;
else if (!innerState.errors.empty())
else if (FFlag::LuauTransitiveSubtyping ? innerState.failure : !innerState.errors.empty())
{
// If errors were suppressed, we store the log up, so we can commit it if no other option succeeds.
if (FFlag::LuauTransitiveSubtyping && innerState.errors.empty())
logs.push_back(std::move(innerState.log));
// 'nil' option is skipped from extended report because we present the type in a special way - 'T?'
if (!firstFailedOption && !isNil(type))
else if (!firstFailedOption && !isNil(type))
firstFailedOption = {innerState.errors.front()};
failed = true;
errorsSuppressed &= innerState.errors.empty();
}
}
@ -684,12 +731,13 @@ void Unifier::tryUnifyUnionWithType(TypeId subTy, const UnionType* subUnion, Typ
{
if (firstFailedOption)
reportError(location, TypeMismatch{superTy, subTy, "Not all union options are compatible.", *firstFailedOption, mismatchContext()});
else
else if (!FFlag::LuauTransitiveSubtyping || !errorsSuppressed)
reportError(location, TypeMismatch{superTy, subTy, mismatchContext()});
failure = true;
}
}
struct BlockedTypeFinder : TypeOnceVisitor
struct DEPRECATED_BlockedTypeFinder : TypeOnceVisitor
{
std::unordered_set<TypeId> blockedTypes;
@ -700,9 +748,10 @@ struct BlockedTypeFinder : TypeOnceVisitor
}
};
bool Unifier::blockOnBlockedTypes(TypeId subTy, TypeId superTy)
bool Unifier::DEPRECATED_blockOnBlockedTypes(TypeId subTy, TypeId superTy)
{
BlockedTypeFinder blockedTypeFinder;
LUAU_ASSERT(!FFlag::LuauNormalizeBlockedTypes);
DEPRECATED_BlockedTypeFinder blockedTypeFinder;
blockedTypeFinder.traverse(subTy);
blockedTypeFinder.traverse(superTy);
if (!blockedTypeFinder.blockedTypes.empty())
@ -718,6 +767,7 @@ void Unifier::tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionTyp
{
// T <: A | B if T <: A or T <: B
bool found = false;
bool errorsSuppressed = false;
std::optional<TypeError> unificationTooComplex;
size_t failedOptionCount = 0;
@ -754,6 +804,21 @@ void Unifier::tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionTyp
}
}
if (FFlag::LuauTransitiveSubtyping && !foundHeuristic)
{
for (size_t i = 0; i < uv->options.size(); ++i)
{
TypeId type = uv->options[i];
if (subTy == type)
{
foundHeuristic = true;
startIndex = i;
break;
}
}
}
if (!foundHeuristic && cacheEnabled)
{
auto& cache = sharedState.cachedUnify;
@ -779,7 +844,7 @@ void Unifier::tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionTyp
innerState.normalize = false;
innerState.tryUnify_(subTy, type, isFunctionCall);
if (innerState.errors.empty())
if (FFlag::LuauTransitiveSubtyping ? !innerState.failure : innerState.errors.empty())
{
found = true;
if (FFlag::DebugLuauDeferredConstraintResolution)
@ -790,6 +855,10 @@ void Unifier::tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionTyp
break;
}
}
else if (FFlag::LuauTransitiveSubtyping && innerState.errors.empty())
{
errorsSuppressed = true;
}
else if (auto e = hasUnificationTooComplex(innerState.errors))
{
unificationTooComplex = e;
@ -810,11 +879,32 @@ void Unifier::tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionTyp
{
reportError(*unificationTooComplex);
}
else if (FFlag::LuauTransitiveSubtyping && !found && normalize)
{
// It is possible that T <: A | B even though T </: A and T </:B
// for example boolean <: true | false.
// We deal with this by type normalization.
const NormalizedType* subNorm = normalizer->normalize(subTy);
const NormalizedType* superNorm = normalizer->normalize(superTy);
Unifier innerState = makeChildUnifier();
if (!subNorm || !superNorm)
return reportError(location, UnificationTooComplex{});
else if ((failedOptionCount == 1 || foundHeuristic) && failedOption)
innerState.tryUnifyNormalizedTypes(subTy, superTy, *subNorm, *superNorm, "None of the union options are compatible. For example:", *failedOption);
else
innerState.tryUnifyNormalizedTypes(subTy, superTy, *subNorm, *superNorm, "none of the union options are compatible");
if (!innerState.failure)
log.concat(std::move(innerState.log));
else if (errorsSuppressed || innerState.errors.empty())
failure = true;
else
reportError(std::move(innerState.errors.front()));
}
else if (!found && normalize)
{
// We cannot normalize a type that contains blocked types. We have to
// stop for now if we find any.
if (blockOnBlockedTypes(subTy, superTy))
if (!FFlag::LuauNormalizeBlockedTypes && DEPRECATED_blockOnBlockedTypes(subTy, superTy))
return;
// It is possible that T <: A | B even though T </: A and T </:B
@ -831,7 +921,9 @@ void Unifier::tryUnifyTypeWithUnion(TypeId subTy, TypeId superTy, const UnionTyp
}
else if (!found)
{
if ((failedOptionCount == 1 || foundHeuristic) && failedOption)
if (FFlag::LuauTransitiveSubtyping && errorsSuppressed)
failure = true;
else if ((failedOptionCount == 1 || foundHeuristic) && failedOption)
reportError(
location, TypeMismatch{superTy, subTy, "None of the union options are compatible. For example:", *failedOption, mismatchContext()});
else
@ -864,6 +956,7 @@ void Unifier::tryUnifyTypeWithIntersection(TypeId subTy, TypeId superTy, const I
logs.push_back(std::move(innerState.log));
else
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
if (FFlag::DebugLuauDeferredConstraintResolution)
@ -895,6 +988,7 @@ void Unifier::tryUnifyIntersectionWithType(TypeId subTy, const IntersectionType*
{
// A & B <: T if A <: T or B <: T
bool found = false;
bool errorsSuppressed = false;
std::optional<TypeError> unificationTooComplex;
size_t startIndex = 0;
@ -919,7 +1013,7 @@ void Unifier::tryUnifyIntersectionWithType(TypeId subTy, const IntersectionType*
{
// We cannot normalize a type that contains blocked types. We have to
// stop for now if we find any.
if (blockOnBlockedTypes(subTy, superTy))
if (!FFlag::LuauNormalizeBlockedTypes && DEPRECATED_blockOnBlockedTypes(subTy, superTy))
return;
// Sometimes a negation type is inside one of the types, e.g. { p: number } & { p: ~number }.
@ -951,13 +1045,18 @@ void Unifier::tryUnifyIntersectionWithType(TypeId subTy, const IntersectionType*
innerState.normalize = false;
innerState.tryUnify_(type, superTy, isFunctionCall);
// TODO: This sets errorSuppressed to true if any of the parts is error-suppressing,
// in paricular any & T is error-suppressing. Really, errorSuppressed should be true if
// all of the parts are error-suppressing, but that fails to typecheck lua-apps.
if (innerState.errors.empty())
{
found = true;
if (FFlag::DebugLuauDeferredConstraintResolution)
errorsSuppressed = innerState.failure;
if (FFlag::DebugLuauDeferredConstraintResolution || (FFlag::LuauTransitiveSubtyping && innerState.failure))
logs.push_back(std::move(innerState.log));
else
{
errorsSuppressed = false;
log.concat(std::move(innerState.log));
break;
}
@ -970,6 +1069,8 @@ void Unifier::tryUnifyIntersectionWithType(TypeId subTy, const IntersectionType*
if (FFlag::DebugLuauDeferredConstraintResolution)
log.concat(combineLogsIntoIntersection(std::move(logs)));
else if (FFlag::LuauTransitiveSubtyping && errorsSuppressed)
log.concat(std::move(logs.front()));
if (unificationTooComplex)
reportError(*unificationTooComplex);
@ -977,7 +1078,7 @@ void Unifier::tryUnifyIntersectionWithType(TypeId subTy, const IntersectionType*
{
// We cannot normalize a type that contains blocked types. We have to
// stop for now if we find any.
if (blockOnBlockedTypes(subTy, superTy))
if (!FFlag::LuauNormalizeBlockedTypes && DEPRECATED_blockOnBlockedTypes(subTy, superTy))
return;
// It is possible that A & B <: T even though A </: T and B </: T
@ -994,19 +1095,39 @@ void Unifier::tryUnifyIntersectionWithType(TypeId subTy, const IntersectionType*
{
reportError(location, TypeMismatch{superTy, subTy, "none of the intersection parts are compatible", mismatchContext()});
}
else if (errorsSuppressed)
failure = true;
}
void Unifier::tryUnifyNormalizedTypes(
TypeId subTy, TypeId superTy, const NormalizedType& subNorm, const NormalizedType& superNorm, std::string reason, std::optional<TypeError> error)
{
if (get<UnknownType>(superNorm.tops) || get<AnyType>(superNorm.tops) || get<AnyType>(subNorm.tops))
if (!FFlag::LuauTransitiveSubtyping && get<UnknownType>(superNorm.tops))
return;
else if (get<UnknownType>(subNorm.tops))
else if (get<AnyType>(superNorm.tops))
return;
else if (get<AnyType>(subNorm.tops))
{
failure = true;
return;
}
else if (!FFlag::LuauTransitiveSubtyping && get<UnknownType>(subNorm.tops))
return reportError(location, TypeMismatch{superTy, subTy, reason, error, mismatchContext()});
if (get<ErrorType>(subNorm.errors))
if (!get<ErrorType>(superNorm.errors))
return reportError(location, TypeMismatch{superTy, subTy, reason, error, mismatchContext()});
{
failure = true;
if (!FFlag::LuauTransitiveSubtyping)
reportError(location, TypeMismatch{superTy, subTy, reason, error, mismatchContext()});
return;
}
if (FFlag::LuauTransitiveSubtyping && get<UnknownType>(superNorm.tops))
return;
if (FFlag::LuauTransitiveSubtyping && get<UnknownType>(subNorm.tops))
return reportError(location, TypeMismatch{superTy, subTy, reason, error, mismatchContext()});
if (get<PrimitiveType>(subNorm.booleans))
{
@ -1911,6 +2032,7 @@ void Unifier::tryUnifyTables(TypeId subTy, TypeId superTy, bool isIntersection)
if (innerState.errors.empty())
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
else if (subTable->indexer && maybeString(subTable->indexer->indexType))
{
@ -1926,6 +2048,7 @@ void Unifier::tryUnifyTables(TypeId subTy, TypeId superTy, bool isIntersection)
if (innerState.errors.empty())
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
else if (subTable->state == TableState::Unsealed && isOptional(prop.type))
// This is sound because unsealed table types are precise, so `{ p : T } <: { p : T, q : U? }`
@ -1988,6 +2111,7 @@ void Unifier::tryUnifyTables(TypeId subTy, TypeId superTy, bool isIntersection)
if (innerState.errors.empty())
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
else if (superTable->state == TableState::Unsealed)
{
@ -2059,6 +2183,7 @@ void Unifier::tryUnifyTables(TypeId subTy, TypeId superTy, bool isIntersection)
if (innerState.errors.empty())
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
else if (superTable->indexer)
{
@ -2234,6 +2359,7 @@ void Unifier::tryUnifyWithMetatable(TypeId subTy, TypeId superTy, bool reversed)
location, TypeMismatch{reversed ? subTy : superTy, reversed ? superTy : subTy, "", innerState.errors.front(), mismatchContext()});
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
else if (TableType* subTable = log.getMutable<TableType>(subTy))
{
@ -2274,6 +2400,7 @@ void Unifier::tryUnifyWithMetatable(TypeId subTy, TypeId superTy, bool reversed)
{
log.concat(std::move(innerState.log));
log.bindTable(subTy, superTy);
failure |= innerState.failure;
}
}
else
@ -2367,6 +2494,7 @@ void Unifier::tryUnifyWithClass(TypeId subTy, TypeId superTy, bool reversed)
if (innerState.errors.empty())
{
log.concat(std::move(innerState.log));
failure |= innerState.failure;
}
else
{
@ -2398,7 +2526,7 @@ void Unifier::tryUnifyNegations(TypeId subTy, TypeId superTy)
// We cannot normalize a type that contains blocked types. We have to
// stop for now if we find any.
if (blockOnBlockedTypes(subTy, superTy))
if (!FFlag::LuauNormalizeBlockedTypes && DEPRECATED_blockOnBlockedTypes(subTy, superTy))
return;
const NormalizedType* subNorm = normalizer->normalize(subTy);
@ -2726,6 +2854,7 @@ Unifier Unifier::makeChildUnifier()
void Unifier::reportError(Location location, TypeErrorData data)
{
errors.emplace_back(std::move(location), std::move(data));
failure = true;
}
// A utility function that appends the given error to the unifier's error log.
@ -2736,6 +2865,7 @@ void Unifier::reportError(Location location, TypeErrorData data)
void Unifier::reportError(TypeError err)
{
errors.push_back(std::move(err));
failure = true;
}

62
Ast/include/Luau/Parser.h
View file

@ -123,13 +123,13 @@ private:
// return [explist]
AstStat* parseReturn();
// type Name `=' typeannotation
// type Name `=' Type
AstStat* parseTypeAlias(const Location& start, bool exported);
AstDeclaredClassProp parseDeclaredClassMethod();
// `declare global' Name: typeannotation |
// `declare function' Name`(' [parlist] `)' [`:` TypeAnnotation]
// `declare global' Name: Type |
// `declare function' Name`(' [parlist] `)' [`:` Type]
AstStat* parseDeclaration(const Location& start);
// varlist `=' explist
@ -140,7 +140,7 @@ private:
std::pair<AstLocal*, AstArray<AstLocal*>> prepareFunctionArguments(const Location& start, bool hasself, const TempVector<Binding>& args);
// funcbodyhead ::= `(' [namelist [`,' `...'] | `...'] `)' [`:` TypeAnnotation]
// funcbodyhead ::= `(' [namelist [`,' `...'] | `...'] `)' [`:` Type]
// funcbody ::= funcbodyhead block end
std::pair<AstExprFunction*, AstLocal*> parseFunctionBody(
bool hasself, const Lexeme& matchFunction, const AstName& debugname, const Name* localName);
@ -148,21 +148,21 @@ private:
// explist ::= {exp `,'} exp
void parseExprList(TempVector<AstExpr*>& result);
// binding ::= Name [`:` TypeAnnotation]
// binding ::= Name [`:` Type]
Binding parseBinding();
// bindinglist ::= (binding | `...') {`,' bindinglist}
// Returns the location of the vararg ..., or std::nullopt if the function is not vararg.
std::tuple<bool, Location, AstTypePack*> parseBindingList(TempVector<Binding>& result, bool allowDot3 = false);
AstType* parseOptionalTypeAnnotation();
AstType* parseOptionalType();
// TypeList ::= TypeAnnotation [`,' TypeList]
// ReturnType ::= TypeAnnotation | `(' TypeList `)'
// TableProp ::= Name `:' TypeAnnotation
// TableIndexer ::= `[' TypeAnnotation `]' `:' TypeAnnotation
// TypeList ::= Type [`,' TypeList]
// ReturnType ::= Type | `(' TypeList `)'
// TableProp ::= Name `:' Type
// TableIndexer ::= `[' Type `]' `:' Type
// PropList ::= (TableProp | TableIndexer) [`,' PropList]
// TypeAnnotation
// Type
// ::= Name
// | `nil`
// | `{' [PropList] `}'
@ -171,24 +171,25 @@ private:
// Returns the variadic annotation, if it exists.
AstTypePack* parseTypeList(TempVector<AstType*>& result, TempVector<std::optional<AstArgumentName>>& resultNames);
std::optional<AstTypeList> parseOptionalReturnTypeAnnotation();
std::pair<Location, AstTypeList> parseReturnTypeAnnotation();
std::optional<AstTypeList> parseOptionalReturnType();
std::pair<Location, AstTypeList> parseReturnType();
AstTableIndexer* parseTableIndexerAnnotation();
AstTableIndexer* parseTableIndexer();
AstTypeOrPack parseFunctionTypeAnnotation(bool allowPack);
AstType* parseFunctionTypeAnnotationTail(const Lexeme& begin, AstArray<AstGenericType> generics, AstArray<AstGenericTypePack> genericPacks,
AstArray<AstType*>& params, AstArray<std::optional<AstArgumentName>>& paramNames, AstTypePack* varargAnnotation);
AstTypeOrPack parseFunctionType(bool allowPack);
AstType* parseFunctionTypeTail(const Lexeme& begin, AstArray<AstGenericType> generics, AstArray<AstGenericTypePack> genericPacks,
AstArray<AstType*> params, AstArray<std::optional<AstArgumentName>> paramNames, AstTypePack* varargAnnotation);
AstType* parseTableTypeAnnotation();
AstTypeOrPack parseSimpleTypeAnnotation(bool allowPack);
AstType* parseTableType();
AstTypeOrPack parseSimpleType(bool allowPack);
AstTypeOrPack parseTypeOrPackAnnotation();
AstType* parseTypeAnnotation(TempVector<AstType*>& parts, const Location& begin);
AstType* parseTypeAnnotation();
AstTypeOrPack parseTypeOrPack();
AstType* parseType();
AstTypePack* parseTypePackAnnotation();
AstTypePack* parseVariadicArgumentAnnotation();
AstTypePack* parseTypePack();
AstTypePack* parseVariadicArgumentTypePack();
AstType* parseTypeSuffix(AstType* type, const Location& begin);
static std::optional<AstExprUnary::Op> parseUnaryOp(const Lexeme& l);
static std::optional<AstExprBinary::Op> parseBinaryOp(const Lexeme& l);
@ -215,7 +216,7 @@ private:
// primaryexp -> prefixexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs }
AstExpr* parsePrimaryExpr(bool asStatement);
// asexp -> simpleexp [`::' typeAnnotation]
// asexp -> simpleexp [`::' Type]
AstExpr* parseAssertionExpr();
// simpleexp -> NUMBER | STRING | NIL | true | false | ... | constructor | FUNCTION body | primaryexp
@ -244,7 +245,7 @@ private:
// `<' namelist `>'
std::pair<AstArray<AstGenericType>, AstArray<AstGenericTypePack>> parseGenericTypeList(bool withDefaultValues);
// `<' typeAnnotation[, ...] `>'
// `<' Type[, ...] `>'
AstArray<AstTypeOrPack> parseTypeParams();
std::optional<AstArray<char>> parseCharArray();
@ -302,13 +303,12 @@ private:
AstStatError* reportStatError(const Location& location, const AstArray<AstExpr*>& expressions, const AstArray<AstStat*>& statements,
const char* format, ...) LUAU_PRINTF_ATTR(5, 6);
AstExprError* reportExprError(const Location& location, const AstArray<AstExpr*>& expressions, const char* format, ...) LUAU_PRINTF_ATTR(4, 5);
AstTypeError* reportTypeAnnotationError(const Location& location, const AstArray<AstType*>& types, const char* format, ...)
LUAU_PRINTF_ATTR(4, 5);
AstTypeError* reportTypeError(const Location& location, const AstArray<AstType*>& types, const char* format, ...) LUAU_PRINTF_ATTR(4, 5);
// `parseErrorLocation` is associated with the parser error
// `astErrorLocation` is associated with the AstTypeError created
// It can be useful to have different error locations so that the parse error can include the next lexeme, while the AstTypeError can precisely
// define the location (possibly of zero size) where a type annotation is expected.
AstTypeError* reportMissingTypeAnnotationError(const Location& parseErrorLocation, const Location& astErrorLocation, const char* format, ...)
AstTypeError* reportMissingTypeError(const Location& parseErrorLocation, const Location& astErrorLocation, const char* format, ...)
LUAU_PRINTF_ATTR(4, 5);
AstExpr* reportFunctionArgsError(AstExpr* func, bool self);
@ -401,8 +401,8 @@ private:
std::vector<Binding> scratchBinding;
std::vector<AstLocal*> scratchLocal;
std::vector<AstTableProp> scratchTableTypeProps;
std::vector<AstType*> scratchAnnotation;
std::vector<AstTypeOrPack> scratchTypeOrPackAnnotation;
std::vector<AstType*> scratchType;
std::vector<AstTypeOrPack> scratchTypeOrPack;
std::vector<AstDeclaredClassProp> scratchDeclaredClassProps;
std::vector<AstExprTable::Item> scratchItem;
std::vector<AstArgumentName> scratchArgName;

223
Ast/src/Parser.cpp
View file

@ -130,7 +130,7 @@ void TempVector<T>::push_back(const T& item)
size_++;
}
static bool shouldParseTypePackAnnotation(Lexer& lexer)
static bool shouldParseTypePack(Lexer& lexer)
{
if (lexer.current().type == Lexeme::Dot3)
return true;
@ -330,11 +330,12 @@ AstStat* Parser::parseStat()
if (options.allowTypeAnnotations)
{
if (ident == "type")
return parseTypeAlias(expr->location, /* exported =*/false);
return parseTypeAlias(expr->location, /* exported= */ false);
if (ident == "export" && lexer.current().type == Lexeme::Name && AstName(lexer.current().name) == "type")
{
nextLexeme();
return parseTypeAlias(expr->location, /* exported =*/true);
return parseTypeAlias(expr->location, /* exported= */ true);
}
}
@ -742,7 +743,7 @@ AstStat* Parser::parseReturn()
return allocator.alloc<AstStatReturn>(Location(start, end), copy(list));
}
// type Name [`<' varlist `>'] `=' typeannotation
// type Name [`<' varlist `>'] `=' Type
AstStat* Parser::parseTypeAlias(const Location& start, bool exported)
{
// note: `type` token is already parsed for us, so we just need to parse the rest
@ -757,7 +758,7 @@ AstStat* Parser::parseTypeAlias(const Location& start, bool exported)
expectAndConsume('=', "type alias");
AstType* type = parseTypeAnnotation();
AstType* type = parseType();
return allocator.alloc<AstStatTypeAlias>(Location(start, type->location), name->name, name->location, generics, genericPacks, type, exported);
}
@ -789,16 +790,16 @@ AstDeclaredClassProp Parser::parseDeclaredClassMethod()
expectMatchAndConsume(')', matchParen);
AstTypeList retTypes = parseOptionalReturnTypeAnnotation().value_or(AstTypeList{copy<AstType*>(nullptr, 0), nullptr});
AstTypeList retTypes = parseOptionalReturnType().value_or(AstTypeList{copy<AstType*>(nullptr, 0), nullptr});
Location end = lexer.current().location;
TempVector<AstType*> vars(scratchAnnotation);
TempVector<AstType*> vars(scratchType);
TempVector<std::optional<AstArgumentName>> varNames(scratchOptArgName);
if (args.size() == 0 || args[0].name.name != "self" || args[0].annotation != nullptr)
{
return AstDeclaredClassProp{
fnName.name, reportTypeAnnotationError(Location(start, end), {}, "'self' must be present as the unannotated first parameter"), true};
fnName.name, reportTypeError(Location(start, end), {}, "'self' must be present as the unannotated first parameter"), true};
}
// Skip the first index.
@ -809,7 +810,7 @@ AstDeclaredClassProp Parser::parseDeclaredClassMethod()
if (args[i].annotation)
vars.push_back(args[i].annotation);
else
vars.push_back(reportTypeAnnotationError(Location(start, end), {}, "All declaration parameters aside from 'self' must be annotated"));
vars.push_back(reportTypeError(Location(start, end), {}, "All declaration parameters aside from 'self' must be annotated"));
}
if (vararg && !varargAnnotation)
@ -846,10 +847,10 @@ AstStat* Parser::parseDeclaration(const Location& start)
expectMatchAndConsume(')', matchParen);
AstTypeList retTypes = parseOptionalReturnTypeAnnotation().value_or(AstTypeList{copy<AstType*>(nullptr, 0)});
AstTypeList retTypes = parseOptionalReturnType().value_or(AstTypeList{copy<AstType*>(nullptr, 0)});
Location end = lexer.current().location;
TempVector<AstType*> vars(scratchAnnotation);
TempVector<AstType*> vars(scratchType);
TempVector<AstArgumentName> varNames(scratchArgName);
for (size_t i = 0; i < args.size(); ++i)
@ -898,7 +899,7 @@ AstStat* Parser::parseDeclaration(const Location& start)
expectMatchAndConsume(']', begin);
expectAndConsume(':', "property type annotation");
AstType* type = parseTypeAnnotation();
AstType* type = parseType();
// TODO: since AstName conains a char*, it can't contain null
bool containsNull = chars && (strnlen(chars->data, chars->size) < chars->size);
@ -912,7 +913,7 @@ AstStat* Parser::parseDeclaration(const Location& start)
{
Name propName = parseName("property name");
expectAndConsume(':', "property type annotation");
AstType* propType = parseTypeAnnotation();
AstType* propType = parseType();
props.push_back(AstDeclaredClassProp{propName.name, propType, false});
}
}
@ -926,7 +927,7 @@ AstStat* Parser::parseDeclaration(const Location& start)
{
expectAndConsume(':', "global variable declaration");
AstType* type = parseTypeAnnotation();
AstType* type = parseType();
return allocator.alloc<AstStatDeclareGlobal>(Location(start, type->location), globalName->name, type);
}
else
@ -1027,7 +1028,7 @@ std::pair<AstExprFunction*, AstLocal*> Parser::parseFunctionBody(
expectMatchAndConsume(')', matchParen, true);
std::optional<AstTypeList> typelist = parseOptionalReturnTypeAnnotation();
std::optional<AstTypeList> typelist = parseOptionalReturnType();
AstLocal* funLocal = nullptr;
@ -1085,7 +1086,7 @@ Parser::Binding Parser::parseBinding()
if (!name)
name = Name(nameError, lexer.current().location);
AstType* annotation = parseOptionalTypeAnnotation();
AstType* annotation = parseOptionalType();
return Binding(*name, annotation);
}
@ -1104,7 +1105,7 @@ std::tuple<bool, Location, AstTypePack*> Parser::parseBindingList(TempVector<Bin
if (lexer.current().type == ':')
{
nextLexeme();
tailAnnotation = parseVariadicArgumentAnnotation();
tailAnnotation = parseVariadicArgumentTypePack();
}
return {true, varargLocation, tailAnnotation};
@ -1120,24 +1121,24 @@ std::tuple<bool, Location, AstTypePack*> Parser::parseBindingList(TempVector<Bin
return {false, Location(), nullptr};
}
AstType* Parser::parseOptionalTypeAnnotation()
AstType* Parser::parseOptionalType()
{
if (options.allowTypeAnnotations && lexer.current().type == ':')
{
nextLexeme();
return parseTypeAnnotation();
return parseType();
}
else
return nullptr;
}
// TypeList ::= TypeAnnotation [`,' TypeList] | ...TypeAnnotation
// TypeList ::= Type [`,' TypeList] | ...Type
AstTypePack* Parser::parseTypeList(TempVector<AstType*>& result, TempVector<std::optional<AstArgumentName>>& resultNames)
{
while (true)
{
if (shouldParseTypePackAnnotation(lexer))
return parseTypePackAnnotation();
if (shouldParseTypePack(lexer))
return parseTypePack();
if (lexer.current().type == Lexeme::Name && lexer.lookahead().type == ':')
{
@ -1156,7 +1157,7 @@ AstTypePack* Parser::parseTypeList(TempVector<AstType*>& result, TempVector<std:
resultNames.push_back({});
}
result.push_back(parseTypeAnnotation());
result.push_back(parseType());
if (lexer.current().type != ',')
break;
@ -1172,7 +1173,7 @@ AstTypePack* Parser::parseTypeList(TempVector<AstType*>& result, TempVector<std:
return nullptr;
}
std::optional<AstTypeList> Parser::parseOptionalReturnTypeAnnotation()
std::optional<AstTypeList> Parser::parseOptionalReturnType()
{
if (options.allowTypeAnnotations && (lexer.current().type == ':' || lexer.current().type == Lexeme::SkinnyArrow))
{
@ -1183,7 +1184,7 @@ std::optional<AstTypeList> Parser::parseOptionalReturnTypeAnnotation()
unsigned int oldRecursionCount = recursionCounter;
auto [_location, result] = parseReturnTypeAnnotation();
auto [_location, result] = parseReturnType();
// At this point, if we find a , character, it indicates that there are multiple return types
// in this type annotation, but the list wasn't wrapped in parentheses.
@ -1202,27 +1203,27 @@ std::optional<AstTypeList> Parser::parseOptionalReturnTypeAnnotation()
return std::nullopt;
}
// ReturnType ::= TypeAnnotation | `(' TypeList `)'
std::pair<Location, AstTypeList> Parser::parseReturnTypeAnnotation()
// ReturnType ::= Type | `(' TypeList `)'
std::pair<Location, AstTypeList> Parser::parseReturnType()
{
incrementRecursionCounter("type annotation");
TempVector<AstType*> result(scratchAnnotation);
TempVector<std::optional<AstArgumentName>> resultNames(scratchOptArgName);
AstTypePack* varargAnnotation = nullptr;
Lexeme begin = lexer.current();
if (lexer.current().type != '(')
{
if (shouldParseTypePackAnnotation(lexer))
varargAnnotation = parseTypePackAnnotation();
if (shouldParseTypePack(lexer))
{
AstTypePack* typePack = parseTypePack();
return {typePack->location, AstTypeList{{}, typePack}};
}
else
result.push_back(parseTypeAnnotation());
{
AstType* type = parseType();
Location resultLocation = result.size() == 0 ? varargAnnotation->location : result[0]->location;
return {resultLocation, AstTypeList{copy(result), varargAnnotation}};
return {type->location, AstTypeList{copy(&type, 1), nullptr}};
}
}
nextLexeme();
@ -1231,6 +1232,10 @@ std::pair<Location, AstTypeList> Parser::parseReturnTypeAnnotation()
matchRecoveryStopOnToken[Lexeme::SkinnyArrow]++;
TempVector<AstType*> result(scratchType);
TempVector<std::optional<AstArgumentName>> resultNames(scratchOptArgName);
AstTypePack* varargAnnotation = nullptr;
// possibly () -> ReturnType
if (lexer.current().type != ')')
varargAnnotation = parseTypeList(result, resultNames);
@ -1246,9 +1251,9 @@ std::pair<Location, AstTypeList> Parser::parseReturnTypeAnnotation()
// If it turns out that it's just '(A)', it's possible that there are unions/intersections to follow, so fold over it.
if (result.size() == 1)
{
AstType* returnType = parseTypeAnnotation(result, innerBegin);
AstType* returnType = parseTypeSuffix(result[0], innerBegin);
// If parseTypeAnnotation parses nothing, then returnType->location.end only points at the last non-type-pack
// If parseType parses nothing, then returnType->location.end only points at the last non-type-pack
// type to successfully parse. We need the span of the whole annotation.
Position endPos = result.size() == 1 ? location.end : returnType->location.end;
@ -1258,39 +1263,33 @@ std::pair<Location, AstTypeList> Parser::parseReturnTypeAnnotation()
return {location, AstTypeList{copy(result), varargAnnotation}};
}
AstArray<AstGenericType> generics{nullptr, 0};
AstArray<AstGenericTypePack> genericPacks{nullptr, 0};
AstArray<AstType*> types = copy(result);
AstArray<std::optional<AstArgumentName>> names = copy(resultNames);
AstType* tail = parseFunctionTypeTail(begin, {}, {}, copy(result), copy(resultNames), varargAnnotation);
TempVector<AstType*> fallbackReturnTypes(scratchAnnotation);
fallbackReturnTypes.push_back(parseFunctionTypeAnnotationTail(begin, generics, genericPacks, types, names, varargAnnotation));
return {Location{location, fallbackReturnTypes[0]->location}, AstTypeList{copy(fallbackReturnTypes), varargAnnotation}};
return {Location{location, tail->location}, AstTypeList{copy(&tail, 1), varargAnnotation}};
}
// TableIndexer ::= `[' TypeAnnotation `]' `:' TypeAnnotation
AstTableIndexer* Parser::parseTableIndexerAnnotation()
// TableIndexer ::= `[' Type `]' `:' Type
AstTableIndexer* Parser::parseTableIndexer()
{
const Lexeme begin = lexer.current();
nextLexeme(); // [
AstType* index = parseTypeAnnotation();
AstType* index = parseType();
expectMatchAndConsume(']', begin);
expectAndConsume(':', "table field");
AstType* result = parseTypeAnnotation();
AstType* result = parseType();
return allocator.alloc<AstTableIndexer>(AstTableIndexer{index, result, Location(begin.location, result->location)});
}
// TableProp ::= Name `:' TypeAnnotation
// TableProp ::= Name `:' Type
// TablePropOrIndexer ::= TableProp | TableIndexer
// PropList ::= TablePropOrIndexer {fieldsep TablePropOrIndexer} [fieldsep]
// TableTypeAnnotation ::= `{' PropList `}'
AstType* Parser::parseTableTypeAnnotation()
// TableType ::= `{' PropList `}'
AstType* Parser::parseTableType()
{
incrementRecursionCounter("type annotation");
@ -1313,7 +1312,7 @@ AstType* Parser::parseTableTypeAnnotation()
expectMatchAndConsume(']', begin);
expectAndConsume(':', "table field");
AstType* type = parseTypeAnnotation();
AstType* type = parseType();
// TODO: since AstName conains a char*, it can't contain null
bool containsNull = chars && (strnlen(chars->data, chars->size) < chars->size);
@ -1329,19 +1328,19 @@ AstType* Parser::parseTableTypeAnnotation()
{
// maybe we don't need to parse the entire badIndexer...
// however, we either have { or [ to lint, not the entire table type or the bad indexer.
AstTableIndexer* badIndexer = parseTableIndexerAnnotation();
AstTableIndexer* badIndexer = parseTableIndexer();
// we lose all additional indexer expressions from the AST after error recovery here
report(badIndexer->location, "Cannot have more than one table indexer");
}
else
{
indexer = parseTableIndexerAnnotation();
indexer = parseTableIndexer();
}
}
else if (props.empty() && !indexer && !(lexer.current().type == Lexeme::Name && lexer.lookahead().type == ':'))
{
AstType* type = parseTypeAnnotation();
AstType* type = parseType();
// array-like table type: {T} desugars into {[number]: T}
AstType* index = allocator.alloc<AstTypeReference>(type->location, std::nullopt, nameNumber);
@ -1358,7 +1357,7 @@ AstType* Parser::parseTableTypeAnnotation()
expectAndConsume(':', "table field");
AstType* type = parseTypeAnnotation();
AstType* type = parseType();
props.push_back({name->name, name->location, type});
}
@ -1382,9 +1381,9 @@ AstType* Parser::parseTableTypeAnnotation()
return allocator.alloc<AstTypeTable>(Location(start, end), copy(props), indexer);
}
// ReturnType ::= TypeAnnotation | `(' TypeList `)'
// FunctionTypeAnnotation ::= [`<' varlist `>'] `(' [TypeList] `)' `->` ReturnType
AstTypeOrPack Parser::parseFunctionTypeAnnotation(bool allowPack)
// ReturnType ::= Type | `(' TypeList `)'
// FunctionType ::= [`<' varlist `>'] `(' [TypeList] `)' `->` ReturnType
AstTypeOrPack Parser::parseFunctionType(bool allowPack)
{
incrementRecursionCounter("type annotation");
@ -1400,7 +1399,7 @@ AstTypeOrPack Parser::parseFunctionTypeAnnotation(bool allowPack)
matchRecoveryStopOnToken[Lexeme::SkinnyArrow]++;
TempVector<AstType*> params(scratchAnnotation);
TempVector<AstType*> params(scratchType);
TempVector<std::optional<AstArgumentName>> names(scratchOptArgName);
AstTypePack* varargAnnotation = nullptr;
@ -1432,12 +1431,11 @@ AstTypeOrPack Parser::parseFunctionTypeAnnotation(bool allowPack)
AstArray<std::optional<AstArgumentName>> paramNames = copy(names);
return {parseFunctionTypeAnnotationTail(begin, generics, genericPacks, paramTypes, paramNames, varargAnnotation), {}};
return {parseFunctionTypeTail(begin, generics, genericPacks, paramTypes, paramNames, varargAnnotation), {}};
}
AstType* Parser::parseFunctionTypeAnnotationTail(const Lexeme& begin, AstArray<AstGenericType> generics, AstArray<AstGenericTypePack> genericPacks,
AstArray<AstType*>& params, AstArray<std::optional<AstArgumentName>>& paramNames, AstTypePack* varargAnnotation)
AstType* Parser::parseFunctionTypeTail(const Lexeme& begin, AstArray<AstGenericType> generics, AstArray<AstGenericTypePack> genericPacks,
AstArray<AstType*> params, AstArray<std::optional<AstArgumentName>> paramNames, AstTypePack* varargAnnotation)
{
incrementRecursionCounter("type annotation");
@ -1458,21 +1456,22 @@ AstType* Parser::parseFunctionTypeAnnotationTail(const Lexeme& begin, AstArray<A
expectAndConsume(Lexeme::SkinnyArrow, "function type");
}
auto [endLocation, returnTypeList] = parseReturnTypeAnnotation();
auto [endLocation, returnTypeList] = parseReturnType();
AstTypeList paramTypes = AstTypeList{params, varargAnnotation};
return allocator.alloc<AstTypeFunction>(Location(begin.location, endLocation), generics, genericPacks, paramTypes, paramNames, returnTypeList);
}
// typeannotation ::=
// Type ::=
// nil |
// Name[`.' Name] [`<' namelist `>'] |
// `{' [PropList] `}' |
// `(' [TypeList] `)' `->` ReturnType
// `typeof` typeannotation
AstType* Parser::parseTypeAnnotation(TempVector<AstType*>& parts, const Location& begin)
// `typeof` Type
AstType* Parser::parseTypeSuffix(AstType* type, const Location& begin)
{
LUAU_ASSERT(!parts.empty());
TempVector<AstType*> parts(scratchType);
parts.push_back(type);
incrementRecursionCounter("type annotation");
@ -1487,7 +1486,7 @@ AstType* Parser::parseTypeAnnotation(TempVector<AstType*>& parts, const Location
if (c == '|')
{
nextLexeme();
parts.push_back(parseSimpleTypeAnnotation(/* allowPack= */ false).type);
parts.push_back(parseSimpleType(/* allowPack= */ false).type);
isUnion = true;
}
else if (c == '?')
@ -1500,7 +1499,7 @@ AstType* Parser::parseTypeAnnotation(TempVector<AstType*>& parts, const Location
else if (c == '&')
{
nextLexeme();
parts.push_back(parseSimpleTypeAnnotation(/* allowPack= */ false).type);
parts.push_back(parseSimpleType(/* allowPack= */ false).type);
isIntersection = true;
}
else if (c == Lexeme::Dot3)
@ -1513,11 +1512,11 @@ AstType* Parser::parseTypeAnnotation(TempVector<AstType*>& parts, const Location
}
if (parts.size() == 1)
return parts[0];
return type;
if (isUnion && isIntersection)
{
return reportTypeAnnotationError(Location(begin, parts.back()->location), copy(parts),
return reportTypeError(Location(begin, parts.back()->location), copy(parts),
"Mixing union and intersection types is not allowed; consider wrapping in parentheses.");
}
@ -1533,16 +1532,14 @@ AstType* Parser::parseTypeAnnotation(TempVector<AstType*>& parts, const Location
ParseError::raise(begin, "Composite type was not an intersection or union.");
}
AstTypeOrPack Parser::parseTypeOrPackAnnotation()
AstTypeOrPack Parser::parseTypeOrPack()
{
unsigned int oldRecursionCount = recursionCounter;
incrementRecursionCounter("type annotation");
Location begin = lexer.current().location;
TempVector<AstType*> parts(scratchAnnotation);
auto [type, typePack] = parseSimpleTypeAnnotation(/* allowPack= */ true);
auto [type, typePack] = parseSimpleType(/* allowPack= */ true);
if (typePack)
{
@ -1550,31 +1547,28 @@ AstTypeOrPack Parser::parseTypeOrPackAnnotation()
return {{}, typePack};
}
parts.push_back(type);
recursionCounter = oldRecursionCount;
return {parseTypeAnnotation(parts, begin), {}};
return {parseTypeSuffix(type, begin), {}};
}
AstType* Parser::parseTypeAnnotation()
AstType* Parser::parseType()
{
unsigned int oldRecursionCount = recursionCounter;
incrementRecursionCounter("type annotation");
Location begin = lexer.current().location;
TempVector<AstType*> parts(scratchAnnotation);
parts.push_back(parseSimpleTypeAnnotation(/* allowPack= */ false).type);
AstType* type = parseSimpleType(/* allowPack= */ false).type;
recursionCounter = oldRecursionCount;
return parseTypeAnnotation(parts, begin);
return parseTypeSuffix(type, begin);
}
// typeannotation ::= nil | Name[`.' Name] [ `<' typeannotation [`,' ...] `>' ] | `typeof' `(' expr `)' | `{' [PropList] `}'
// Type ::= nil | Name[`.' Name] [ `<' Type [`,' ...] `>' ] | `typeof' `(' expr `)' | `{' [PropList] `}'
// | [`<' varlist `>'] `(' [TypeList] `)' `->` ReturnType
AstTypeOrPack Parser::parseSimpleTypeAnnotation(bool allowPack)
AstTypeOrPack Parser::parseSimpleType(bool allowPack)
{
incrementRecursionCounter("type annotation");
@ -1603,18 +1597,18 @@ AstTypeOrPack Parser::parseSimpleTypeAnnotation(bool allowPack)
return {allocator.alloc<AstTypeSingletonString>(start, svalue)};
}
else
return {reportTypeAnnotationError(start, {}, "String literal contains malformed escape sequence")};
return {reportTypeError(start, {}, "String literal contains malformed escape sequence")};
}
else if (lexer.current().type == Lexeme::InterpStringBegin || lexer.current().type == Lexeme::InterpStringSimple)
{
parseInterpString();
return {reportTypeAnnotationError(start, {}, "Interpolated string literals cannot be used as types")};
return {reportTypeError(start, {}, "Interpolated string literals cannot be used as types")};
}
else if (lexer.current().type == Lexeme::BrokenString)
{
nextLexeme();
return {reportTypeAnnotationError(start, {}, "Malformed string")};
return {reportTypeError(start, {}, "Malformed string")};
}
else if (lexer.current().type == Lexeme::Name)
{
@ -1663,17 +1657,17 @@ AstTypeOrPack Parser::parseSimpleTypeAnnotation(bool allowPack)
}
else if (lexer.current().type == '{')
{
return {parseTableTypeAnnotation(), {}};
return {parseTableType(), {}};
}
else if (lexer.current().type == '(' || lexer.current().type == '<')
{
return parseFunctionTypeAnnotation(allowPack);
return parseFunctionType(allowPack);
}
else if (lexer.current().type == Lexeme::ReservedFunction)
{
nextLexeme();
return {reportTypeAnnotationError(start, {},
return {reportTypeError(start, {},
"Using 'function' as a type annotation is not supported, consider replacing with a function type annotation e.g. '(...any) -> "
"...any'"),
{}};
@ -1685,12 +1679,11 @@ AstTypeOrPack Parser::parseSimpleTypeAnnotation(bool allowPack)
// The parse error includes the next lexeme to make it easier to display where the error is (e.g. in an IDE or a CLI error message).
// Including the current lexeme also makes the parse error consistent with other parse errors returned by Luau.
Location parseErrorLocation(lexer.previousLocation().end, start.end);
return {
reportMissingTypeAnnotationError(parseErrorLocation, astErrorlocation, "Expected type, got %s", lexer.current().toString().c_str()), {}};
return {reportMissingTypeError(parseErrorLocation, astErrorlocation, "Expected type, got %s", lexer.current().toString().c_str()), {}};
}
}
AstTypePack* Parser::parseVariadicArgumentAnnotation()
AstTypePack* Parser::parseVariadicArgumentTypePack()
{
// Generic: a...
if (lexer.current().type == Lexeme::Name && lexer.lookahead().type == Lexeme::Dot3)
@ -1705,19 +1698,19 @@ AstTypePack* Parser::parseVariadicArgumentAnnotation()
// Variadic: T
else
{
AstType* variadicAnnotation = parseTypeAnnotation();
AstType* variadicAnnotation = parseType();
return allocator.alloc<AstTypePackVariadic>(variadicAnnotation->location, variadicAnnotation);
}
}
AstTypePack* Parser::parseTypePackAnnotation()
AstTypePack* Parser::parseTypePack()
{
// Variadic: ...T
if (lexer.current().type == Lexeme::Dot3)
{
Location start = lexer.current().location;
nextLexeme();
AstType* varargTy = parseTypeAnnotation();
AstType* varargTy = parseType();
return allocator.alloc<AstTypePackVariadic>(Location(start, varargTy->location), varargTy);
}
// Generic: a...
@ -2054,7 +2047,7 @@ AstExpr* Parser::parsePrimaryExpr(bool asStatement)
return expr;
}
// asexp -> simpleexp [`::' typeannotation]
// asexp -> simpleexp [`::' Type]
AstExpr* Parser::parseAssertionExpr()
{
Location start = lexer.current().location;
@ -2063,7 +2056,7 @@ AstExpr* Parser::parseAssertionExpr()
if (options.allowTypeAnnotations && lexer.current().type == Lexeme::DoubleColon)
{
nextLexeme();
AstType* annotation = parseTypeAnnotation();
AstType* annotation = parseType();
return allocator.alloc<AstExprTypeAssertion>(Location(start, annotation->location), expr, annotation);
}
else
@ -2455,15 +2448,15 @@ std::pair<AstArray<AstGenericType>, AstArray<AstGenericTypePack>> Parser::parseG
Lexeme packBegin = lexer.current();
if (shouldParseTypePackAnnotation(lexer))
if (shouldParseTypePack(lexer))
{
AstTypePack* typePack = parseTypePackAnnotation();
AstTypePack* typePack = parseTypePack();
namePacks.push_back({name, nameLocation, typePack});
}
else if (!FFlag::LuauParserErrorsOnMissingDefaultTypePackArgument && lexer.current().type == '(')
{
auto [type, typePack] = parseTypeOrPackAnnotation();
auto [type, typePack] = parseTypeOrPack();
if (type)
report(Location(packBegin.location.begin, lexer.previousLocation().end), "Expected type pack after '=', got type");
@ -2472,7 +2465,7 @@ std::pair<AstArray<AstGenericType>, AstArray<AstGenericTypePack>> Parser::parseG
}
else if (FFlag::LuauParserErrorsOnMissingDefaultTypePackArgument)
{
auto [type, typePack] = parseTypeOrPackAnnotation();
auto [type, typePack] = parseTypeOrPack();
if (type)
report(type->location, "Expected type pack after '=', got type");
@ -2495,7 +2488,7 @@ std::pair<AstArray<AstGenericType>, AstArray<AstGenericTypePack>> Parser::parseG
seenDefault = true;
nextLexeme();
AstType* defaultType = parseTypeAnnotation();
AstType* defaultType = parseType();
names.push_back({name, nameLocation, defaultType});
}
@ -2532,7 +2525,7 @@ std::pair<AstArray<AstGenericType>, AstArray<AstGenericTypePack>> Parser::parseG
AstArray<AstTypeOrPack> Parser::parseTypeParams()
{
TempVector<AstTypeOrPack> parameters{scratchTypeOrPackAnnotation};
TempVector<AstTypeOrPack> parameters{scratchTypeOrPack};
if (lexer.current().type == '<')
{
@ -2541,15 +2534,15 @@ AstArray<AstTypeOrPack> Parser::parseTypeParams()
while (true)
{
if (shouldParseTypePackAnnotation(lexer))
if (shouldParseTypePack(lexer))
{
AstTypePack* typePack = parseTypePackAnnotation();
AstTypePack* typePack = parseTypePack();
parameters.push_back({{}, typePack});
}
else if (lexer.current().type == '(')
{
auto [type, typePack] = parseTypeOrPackAnnotation();
auto [type, typePack] = parseTypeOrPack();
if (typePack)
parameters.push_back({{}, typePack});
@ -2562,7 +2555,7 @@ AstArray<AstTypeOrPack> Parser::parseTypeParams()
}
else
{
parameters.push_back({parseTypeAnnotation(), {}});
parameters.push_back({parseType(), {}});
}
if (lexer.current().type == ',')
@ -3018,7 +3011,7 @@ AstExprError* Parser::reportExprError(const Location& location, const AstArray<A
return allocator.alloc<AstExprError>(location, expressions, unsigned(parseErrors.size() - 1));
}
AstTypeError* Parser::reportTypeAnnotationError(const Location& location, const AstArray<AstType*>& types, const char* format, ...)
AstTypeError* Parser::reportTypeError(const Location& location, const AstArray<AstType*>& types, const char* format, ...)
{
va_list args;
va_start(args, format);
@ -3028,7 +3021,7 @@ AstTypeError* Parser::reportTypeAnnotationError(const Location& location, const
return allocator.alloc<AstTypeError>(location, types, false, unsigned(parseErrors.size() - 1));
}
AstTypeError* Parser::reportMissingTypeAnnotationError(const Location& parseErrorLocation, const Location& astErrorLocation, const char* format, ...)
AstTypeError* Parser::reportMissingTypeError(const Location& parseErrorLocation, const Location& astErrorLocation, const char* format, ...)
{
va_list args;
va_start(args, format);

4
CLI/Analyze.cpp
View file

@ -14,6 +14,7 @@
#endif
LUAU_FASTFLAG(DebugLuauTimeTracing)
LUAU_FASTFLAG(LuauLintInTypecheck)
enum class ReportFormat
{
@ -80,7 +81,7 @@ static bool analyzeFile(Luau::Frontend& frontend, const char* name, ReportFormat
for (auto& error : cr.errors)
reportError(frontend, format, error);
Luau::LintResult lr = frontend.lint(name);
Luau::LintResult lr = FFlag::LuauLintInTypecheck ? cr.lintResult : frontend.lint_DEPRECATED(name);
std::string humanReadableName = frontend.fileResolver->getHumanReadableModuleName(name);
for (auto& error : lr.errors)
@ -263,6 +264,7 @@ int main(int argc, char** argv)
Luau::FrontendOptions frontendOptions;
frontendOptions.retainFullTypeGraphs = annotate;
frontendOptions.runLintChecks = FFlag::LuauLintInTypecheck;
CliFileResolver fileResolver;
CliConfigResolver configResolver(mode);

7
CodeGen/include/Luau/AssemblyBuilderA64.h
View file

@ -93,6 +93,13 @@ public:
// Assigns label position to the current location
void setLabel(Label& label);
// Extracts code offset (in bytes) from label
uint32_t getLabelOffset(const Label& label)
{
LUAU_ASSERT(label.location != ~0u);
return label.location * 4;
}
void logAppend(const char* fmt, ...) LUAU_PRINTF_ATTR(2, 3);
uint32_t getCodeSize() const;

7
CodeGen/include/Luau/AssemblyBuilderX64.h
View file

@ -155,6 +155,13 @@ public:
// Assigns label position to the current location
void setLabel(Label& label);
// Extracts code offset (in bytes) from label
uint32_t getLabelOffset(const Label& label)
{
LUAU_ASSERT(label.location != ~0u);
return label.location;
}
// Constant allocation (uses rip-relative addressing)
OperandX64 i64(int64_t value);
OperandX64 f32(float value);

3
CodeGen/include/Luau/CodeAllocator.h
View file

@ -21,7 +21,8 @@ struct CodeAllocator
// Places data and code into the executable page area
// To allow allocation while previously allocated code is already running, allocation has page granularity
// It's important to group functions together so that page alignment won't result in a lot of wasted space
bool allocate(uint8_t* data, size_t dataSize, uint8_t* code, size_t codeSize, uint8_t*& result, size_t& resultSize, uint8_t*& resultCodeStart);
bool allocate(
const uint8_t* data, size_t dataSize, const uint8_t* code, size_t codeSize, uint8_t*& result, size_t& resultSize, uint8_t*& resultCodeStart);
// Provided to callbacks
void* context = nullptr;

1
CodeGen/include/Luau/IrAnalysis.h
View file

@ -42,6 +42,7 @@ struct CfgInfo
std::vector<uint32_t> successorsOffsets;
std::vector<RegisterSet> in;
std::vector<RegisterSet> def;
std::vector<RegisterSet> out;
RegisterSet captured;

46
CodeGen/include/Luau/IrBuilder.h
View file

@ -1,8 +1,9 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#pragma once
#include "Luau/Common.h"
#include "Luau/Bytecode.h"
#include "Luau/Common.h"
#include "Luau/DenseHash.h"
#include "Luau/IrData.h"
#include <vector>
@ -19,6 +20,8 @@ struct AssemblyOptions;
struct IrBuilder
{
IrBuilder();
void buildFunctionIr(Proto* proto);
void rebuildBytecodeBasicBlocks(Proto* proto);
@ -38,7 +41,7 @@ struct IrBuilder
IrOp constUint(unsigned value);
IrOp constDouble(double value);
IrOp constTag(uint8_t value);
IrOp constAny(IrConst constant);
IrOp constAny(IrConst constant, uint64_t asCommonKey);
IrOp cond(IrCondition cond);
@ -67,6 +70,45 @@ struct IrBuilder
uint32_t activeBlockIdx = ~0u;
std::vector<uint32_t> instIndexToBlock; // Block index at the bytecode instruction
// Similar to BytecodeBuilder, duplicate constants are removed used the same method
struct ConstantKey
{
IrConstKind kind;
// Note: this stores value* from IrConst; when kind is Double, this stores the same bits as double does but in uint64_t.
uint64_t value;
bool operator==(const ConstantKey& key) const
{
return kind == key.kind && value == key.value;
}
};
struct ConstantKeyHash
{
size_t operator()(const ConstantKey& key) const
{
// finalizer from MurmurHash64B
const uint32_t m = 0x5bd1e995;
uint32_t h1 = uint32_t(key.value);
uint32_t h2 = uint32_t(key.value >> 32) ^ (int(key.kind) * m);
h1 ^= h2 >> 18;
h1 *= m;
h2 ^= h1 >> 22;
h2 *= m;
h1 ^= h2 >> 17;
h1 *= m;
h2 ^= h1 >> 19;
h2 *= m;
// ... truncated to 32-bit output (normally hash is equal to (uint64_t(h1) << 32) | h2, but we only really need the lower 32-bit half)
return size_t(h2);
}
};
DenseHashMap<ConstantKey, uint32_t, ConstantKeyHash> constantMap;
};
} // namespace CodeGen

45
CodeGen/include/Luau/IrData.h
View file

@ -22,7 +22,7 @@ namespace CodeGen
// In the command description, following abbreviations are used:
// * Rn - VM stack register slot, n in 0..254
// * Kn - VM proto constant slot, n in 0..2^23-1
// * UPn - VM function upvalue slot, n in 0..254
// * UPn - VM function upvalue slot, n in 0..199
// * A, B, C, D, E are instruction arguments
enum class IrCmd : uint8_t
{
@ -64,6 +64,11 @@ enum class IrCmd : uint8_t
// A: pointer (Table)
GET_SLOT_NODE_ADDR,
// Get pointer (LuaNode) to table node element at the main position of the specified key hash
// A: pointer (Table)
// B: unsigned int
GET_HASH_NODE_ADDR,
// Store a tag into TValue
// A: Rn
// B: tag
@ -173,6 +178,13 @@ enum class IrCmd : uint8_t
// E: block (if false)
JUMP_CMP_ANY,
// Perform a conditional jump based on cached table node slot matching the actual table node slot for a key
// A: pointer (LuaNode)
// B: Kn
// C: block (if matches)
// D: block (if it doesn't)
JUMP_SLOT_MATCH,
// Get table length
// A: pointer (Table)
TABLE_LEN,
@ -189,7 +201,13 @@ enum class IrCmd : uint8_t
// Try to convert a double number into a table index (int) or jump if it's not an integer
// A: double
// B: block
NUM_TO_INDEX,
TRY_NUM_TO_INDEX,
// Try to get pointer to tag method TValue inside the table's metatable or jump if there is no such value or metatable
// A: table
// B: int
// C: block
TRY_CALL_FASTGETTM,
// Convert integer into a double number
// A: int
@ -315,6 +333,11 @@ enum class IrCmd : uint8_t
// C: block
CHECK_SLOT_MATCH,
// Guard against table node with a linked next node to ensure that our lookup hits the main position of the key
// A: pointer (LuaNode)
// B: block
CHECK_NODE_NO_NEXT,
// Special operations
// Check interrupt handler
@ -361,14 +384,6 @@ enum class IrCmd : uint8_t
// E: unsigned int (table index to start from)
LOP_SETLIST,
// Load function from source register using name into target register and copying source register into target register + 1
// A: unsigned int (bytecode instruction index)
// B: Rn (target)
// C: Rn (source)
// D: block (next)
// E: block (fallback)
LOP_NAMECALL,
// Call specified function
// A: unsigned int (bytecode instruction index)
// B: Rn (function, followed by arguments)
@ -576,6 +591,16 @@ struct IrOp
, index(index)
{
}
bool operator==(const IrOp& rhs) const
{
return kind == rhs.kind && index == rhs.index;
}
bool operator!=(const IrOp& rhs) const
{
return !(*this == rhs);
}
};
static_assert(sizeof(IrOp) == 4);

4
CodeGen/include/Luau/IrDump.h
View file

@ -37,5 +37,9 @@ std::string toString(IrFunction& function, bool includeUseInfo);
std::string dump(IrFunction& function);
std::string toDot(IrFunction& function, bool includeInst);
std::string dumpDot(IrFunction& function, bool includeInst);
} // namespace CodeGen
} // namespace Luau

6
CodeGen/include/Luau/IrUtils.h
View file

@ -98,7 +98,7 @@ inline bool isBlockTerminator(IrCmd cmd)
case IrCmd::JUMP_EQ_POINTER:
case IrCmd::JUMP_CMP_NUM:
case IrCmd::JUMP_CMP_ANY:
case IrCmd::LOP_NAMECALL:
case IrCmd::JUMP_SLOT_MATCH:
case IrCmd::LOP_RETURN:
case IrCmd::LOP_FORGLOOP:
case IrCmd::LOP_FORGLOOP_FALLBACK:
@ -125,6 +125,7 @@ inline bool hasResult(IrCmd cmd)
case IrCmd::LOAD_ENV:
case IrCmd::GET_ARR_ADDR:
case IrCmd::GET_SLOT_NODE_ADDR:
case IrCmd::GET_HASH_NODE_ADDR:
case IrCmd::ADD_INT:
case IrCmd::SUB_INT:
case IrCmd::ADD_NUM:
@ -140,7 +141,8 @@ inline bool hasResult(IrCmd cmd)
case IrCmd::TABLE_LEN:
case IrCmd::NEW_TABLE:
case IrCmd::DUP_TABLE:
case IrCmd::NUM_TO_INDEX:
case IrCmd::TRY_NUM_TO_INDEX:
case IrCmd::TRY_CALL_FASTGETTM:
case IrCmd::INT_TO_NUM:
case IrCmd::SUBSTITUTE:
case IrCmd::INVOKE_FASTCALL:

2
CodeGen/src/CodeAllocator.cpp
View file

@ -112,7 +112,7 @@ CodeAllocator::~CodeAllocator()
}
bool CodeAllocator::allocate(
uint8_t* data, size_t dataSize, uint8_t* code, size_t codeSize, uint8_t*& result, size_t& resultSize, uint8_t*& resultCodeStart)
const uint8_t* data, size_t dataSize, const uint8_t* code, size_t codeSize, uint8_t*& result, size_t& resultSize, uint8_t*& resultCodeStart)
{
// 'Round up' to preserve code alignment
size_t alignedDataSize = (dataSize + (kCodeAlignment - 1)) & ~(kCodeAlignment - 1);

139
CodeGen/src/CodeGen.cpp
View file

@ -1,7 +1,6 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Luau/CodeGen.h"
#include "Luau/AssemblyBuilderX64.h"
#include "Luau/Common.h"
#include "Luau/CodeAllocator.h"
#include "Luau/CodeBlockUnwind.h"
@ -9,12 +8,17 @@
#include "Luau/IrBuilder.h"
#include "Luau/OptimizeConstProp.h"
#include "Luau/OptimizeFinalX64.h"
#include "Luau/UnwindBuilder.h"
#include "Luau/UnwindBuilderDwarf2.h"
#include "Luau/UnwindBuilderWin.h"
#include "Luau/AssemblyBuilderX64.h"
#include "Luau/AssemblyBuilderA64.h"
#include "CustomExecUtils.h"
#include "CodeGenX64.h"
#include "CodeGenA64.h"
#include "EmitCommonX64.h"
#include "EmitInstructionX64.h"
#include "IrLoweringX64.h"
@ -39,32 +43,55 @@ namespace Luau
namespace CodeGen
{
constexpr uint32_t kFunctionAlignment = 32;
static void assembleHelpers(X64::AssemblyBuilderX64& build, ModuleHelpers& helpers)
{
if (build.logText)
build.logAppend("; exitContinueVm\n");
helpers.exitContinueVm = build.setLabel();
emitExit(build, /* continueInVm */ true);
if (build.logText)
build.logAppend("; exitNoContinueVm\n");
helpers.exitNoContinueVm = build.setLabel();
emitExit(build, /* continueInVm */ false);
if (build.logText)
build.logAppend("; continueCallInVm\n");
helpers.continueCallInVm = build.setLabel();
emitContinueCallInVm(build);
}
static NativeProto* assembleFunction(X64::AssemblyBuilderX64& build, NativeState& data, ModuleHelpers& helpers, Proto* proto, AssemblyOptions options)
static NativeProto* createNativeProto(Proto* proto, const IrBuilder& ir)
{
NativeProto* result = new NativeProto();
result->proto = proto;
result->instTargets = new uintptr_t[proto->sizecode];
for (int i = 0; i < proto->sizecode; i++)
{
auto [irLocation, asmLocation] = ir.function.bcMapping[i];
result->instTargets[i] = irLocation == ~0u ? 0 : asmLocation;
}
return result;
}
[[maybe_unused]] static void lowerIr(
X64::AssemblyBuilderX64& build, IrBuilder& ir, NativeState& data, ModuleHelpers& helpers, Proto* proto, AssemblyOptions options)
{
constexpr uint32_t kFunctionAlignment = 32;
optimizeMemoryOperandsX64(ir.function);
build.align(kFunctionAlignment, X64::AlignmentDataX64::Ud2);
X64::IrLoweringX64 lowering(build, helpers, data, proto, ir.function);
lowering.lower(options);
}
[[maybe_unused]] static void lowerIr(
A64::AssemblyBuilderA64& build, IrBuilder& ir, NativeState& data, ModuleHelpers& helpers, Proto* proto, AssemblyOptions options)
{
Label start = build.setLabel();
build.mov(A64::x0, 1); // finish function in VM
build.ret();
// TODO: This is only needed while we don't support all IR opcodes
// When we can't translate some parts of the function, we instead encode a dummy assembly sequence that hands off control to VM
// In the future we could return nullptr from assembleFunction and handle it because there may be other reasons for why we refuse to assemble.
for (int i = 0; i < proto->sizecode; i++)
ir.function.bcMapping[i].asmLocation = build.getLabelOffset(start);
}
template<typename AssemblyBuilder>
static NativeProto* assembleFunction(AssemblyBuilder& build, NativeState& data, ModuleHelpers& helpers, Proto* proto, AssemblyOptions options)
{
if (options.includeAssembly || options.includeIr)
{
if (proto->debugname)
@ -93,43 +120,24 @@ static NativeProto* assembleFunction(X64::AssemblyBuilderX64& build, NativeState
build.logAppend("\n");
}
build.align(kFunctionAlignment, X64::AlignmentDataX64::Ud2);
Label start = build.setLabel();
IrBuilder builder;
builder.buildFunctionIr(proto);
IrBuilder ir;
ir.buildFunctionIr(proto);
if (!FFlag::DebugCodegenNoOpt)
{
constPropInBlockChains(builder);
constPropInBlockChains(ir);
}
// TODO: cfg info has to be computed earlier to use in optimizations
// It's done here to appear in text output and to measure performance impact on code generation
computeCfgInfo(builder.function);
computeCfgInfo(ir.function);
optimizeMemoryOperandsX64(builder.function);
X64::IrLoweringX64 lowering(build, helpers, data, proto, builder.function);
lowering.lower(options);
result->instTargets = new uintptr_t[proto->sizecode];
for (int i = 0; i < proto->sizecode; i++)
{
auto [irLocation, asmLocation] = builder.function.bcMapping[i];
result->instTargets[i] = irLocation == ~0u ? 0 : asmLocation - start.location;
}
result->location = start.location;
lowerIr(build, ir, data, helpers, proto, options);
if (build.logText)
build.logAppend("\n");
return result;
return createNativeProto(proto, ir);
}
static void destroyNativeProto(NativeProto* nativeProto)
@ -207,6 +215,8 @@ bool isSupported()
if ((cpuinfo[2] & (1 << 28)) == 0)
return false;
return true;
#elif defined(__aarch64__)
return true;
#else
return false;
@ -232,11 +242,19 @@ void create(lua_State* L)
initFallbackTable(data);
initHelperFunctions(data);
#if defined(__x86_64__) || defined(_M_X64)
if (!X64::initEntryFunction(data))
{
destroyNativeState(L);
return;
}
#elif defined(__aarch64__)
if (!A64::initEntryFunction(data))
{
destroyNativeState(L);
return;
}
#endif
lua_ExecutionCallbacks* ecb = getExecutionCallbacks(L);
@ -270,14 +288,21 @@ void compile(lua_State* L, int idx)
if (!getNativeState(L))
return;
#if defined(__aarch64__)
A64::AssemblyBuilderA64 build(/* logText= */ false);
#else
X64::AssemblyBuilderX64 build(/* logText= */ false);
#endif
NativeState* data = getNativeState(L);
std::vector<Proto*> protos;
gatherFunctions(protos, clvalue(func)->l.p);
ModuleHelpers helpers;
assembleHelpers(build, helpers);
#if !defined(__aarch64__)
X64::assembleHelpers(build, helpers);
#endif
std::vector<NativeProto*> results;
results.reserve(protos.size());
@ -292,8 +317,8 @@ void compile(lua_State* L, int idx)
uint8_t* nativeData = nullptr;
size_t sizeNativeData = 0;
uint8_t* codeStart = nullptr;
if (!data->codeAllocator.allocate(
build.data.data(), int(build.data.size()), build.code.data(), int(build.code.size()), nativeData, sizeNativeData, codeStart))
if (!data->codeAllocator.allocate(build.data.data(), int(build.data.size()), reinterpret_cast<const uint8_t*>(build.code.data()),
int(build.code.size() * sizeof(build.code[0])), nativeData, sizeNativeData, codeStart))
{
for (NativeProto* result : results)
destroyNativeProto(result);
@ -305,7 +330,7 @@ void compile(lua_State* L, int idx)
for (NativeProto* result : results)
{
for (int i = 0; i < result->proto->sizecode; i++)
result->instTargets[i] += uintptr_t(codeStart + result->location);
result->instTargets[i] += uintptr_t(codeStart);
LUAU_ASSERT(result->proto->sizecode);
result->entryTarget = result->instTargets[0];
@ -321,7 +346,11 @@ std::string getAssembly(lua_State* L, int idx, AssemblyOptions options)
LUAU_ASSERT(lua_isLfunction(L, idx));
const TValue* func = luaA_toobject(L, idx);
#if defined(__aarch64__)
A64::AssemblyBuilderA64 build(/* logText= */ options.includeAssembly);
#else
X64::AssemblyBuilderX64 build(/* logText= */ options.includeAssembly);
#endif
NativeState data;
initFallbackTable(data);
@ -330,7 +359,9 @@ std::string getAssembly(lua_State* L, int idx, AssemblyOptions options)
gatherFunctions(protos, clvalue(func)->l.p);
ModuleHelpers helpers;
assembleHelpers(build, helpers);
#if !defined(__aarch64__)
X64::assembleHelpers(build, helpers);
#endif
for (Proto* p : protos)
if (p)
@ -342,7 +373,9 @@ std::string getAssembly(lua_State* L, int idx, AssemblyOptions options)
build.finalize();
if (options.outputBinary)
return std::string(build.code.begin(), build.code.end()) + std::string(build.data.begin(), build.data.end());
return std::string(
reinterpret_cast<const char*>(build.code.data()), reinterpret_cast<const char*>(build.code.data() + build.code.size())) +
std::string(build.data.begin(), build.data.end());
else
return build.text;
}

69
CodeGen/src/CodeGenA64.cpp Normal file
View file

@ -0,0 +1,69 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "CodeGenA64.h"
#include "Luau/AssemblyBuilderA64.h"
#include "Luau/UnwindBuilder.h"
#include "CustomExecUtils.h"
#include "NativeState.h"
#include "lstate.h"
namespace Luau
{
namespace CodeGen
{
namespace A64
{
bool initEntryFunction(NativeState& data)
{
AssemblyBuilderA64 build(/* logText= */ false);
UnwindBuilder& unwind = *data.unwindBuilder.get();
unwind.start();
unwind.allocStack(8); // TODO: this is only necessary to align stack by 16 bytes, as start() allocates 8b return pointer
// TODO: prologue goes here
unwind.finish();
size_t prologueSize = build.setLabel().location;
// Setup native execution environment
// TODO: figure out state layout
// Jump to the specified instruction; further control flow will be handled with custom ABI with register setup from EmitCommonX64.h
build.br(x2);
// Even though we jumped away, we will return here in the end
Label returnOff = build.setLabel();
// Cleanup and exit
// TODO: epilogue
build.ret();
build.finalize();
LUAU_ASSERT(build.data.empty());
if (!data.codeAllocator.allocate(build.data.data(), int(build.data.size()), reinterpret_cast<const uint8_t*>(build.code.data()),
int(build.code.size() * sizeof(build.code[0])), data.gateData, data.gateDataSize, data.context.gateEntry))
{
LUAU_ASSERT(!"failed to create entry function");
return false;
}
// Set the offset at the begining so that functions in new blocks will not overlay the locations
// specified by the unwind information of the entry function
unwind.setBeginOffset(prologueSize);
data.context.gateExit = data.context.gateEntry + returnOff.location;
return true;
}
} // namespace A64
} // namespace CodeGen
} // namespace Luau

18
CodeGen/src/CodeGenA64.h Normal file
View file

@ -0,0 +1,18 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#pragma once
namespace Luau
{
namespace CodeGen
{
struct NativeState;
namespace A64
{
bool initEntryFunction(NativeState& data);
} // namespace A64
} // namespace CodeGen
} // namespace Luau

18
CodeGen/src/CodeGenX64.cpp
View file

@ -143,6 +143,24 @@ bool initEntryFunction(NativeState& data)
return true;
}
void assembleHelpers(X64::AssemblyBuilderX64& build, ModuleHelpers& helpers)
{
if (build.logText)
build.logAppend("; exitContinueVm\n");
helpers.exitContinueVm = build.setLabel();
emitExit(build, /* continueInVm */ true);
if (build.logText)
build.logAppend("; exitNoContinueVm\n");
helpers.exitNoContinueVm = build.setLabel();
emitExit(build, /* continueInVm */ false);
if (build.logText)
build.logAppend("; continueCallInVm\n");
helpers.continueCallInVm = build.setLabel();
emitContinueCallInVm(build);
}
} // namespace X64
} // namespace CodeGen
} // namespace Luau

4
CodeGen/src/CodeGenX64.h
View file

@ -7,11 +7,15 @@ namespace CodeGen
{
struct NativeState;
struct ModuleHelpers;
namespace X64
{
class AssemblyBuilderX64;
bool initEntryFunction(NativeState& data);
void assembleHelpers(AssemblyBuilderX64& build, ModuleHelpers& helpers);
} // namespace X64
} // namespace CodeGen

29
CodeGen/src/EmitBuiltinsX64.cpp
View file

@ -286,6 +286,31 @@ void emitBuiltinMathSign(IrRegAllocX64& regs, AssemblyBuilderX64& build, int npa
build.vmovsd(luauRegValue(ra), tmp0.reg);
}
void emitBuiltinType(IrRegAllocX64& regs, AssemblyBuilderX64& build, int nparams, int ra, int arg, OperandX64 args, int nresults)
{
ScopedRegX64 tmp0{regs, SizeX64::qword};
ScopedRegX64 tag{regs, SizeX64::dword};
build.mov(tag.reg, luauRegTag(arg));
build.mov(tmp0.reg, qword[rState + offsetof(lua_State, global)]);
build.mov(tmp0.reg, qword[tmp0.reg + qwordReg(tag.reg) * sizeof(TString*) + offsetof(global_State, ttname)]);
build.mov(luauRegValue(ra), tmp0.reg);
}
void emitBuiltinTypeof(IrRegAllocX64& regs, AssemblyBuilderX64& build, int nparams, int ra, int arg, OperandX64 args, int nresults)
{
regs.assertAllFree();
build.mov(rArg1, rState);
build.lea(rArg2, luauRegAddress(arg));
build.call(qword[rNativeContext + offsetof(NativeContext, luaT_objtypenamestr)]);
build.mov(luauRegValue(ra), rax);
}
void emitBuiltin(IrRegAllocX64& regs, AssemblyBuilderX64& build, int bfid, int ra, int arg, IrOp args, int nparams, int nresults)
{
OperandX64 argsOp = 0;
@ -353,6 +378,10 @@ void emitBuiltin(IrRegAllocX64& regs, AssemblyBuilderX64& build, int bfid, int r
return emitBuiltinMathModf(regs, build, nparams, ra, arg, argsOp, nresults);
case LBF_MATH_SIGN:
return emitBuiltinMathSign(regs, build, nparams, ra, arg, argsOp, nresults);
case LBF_TYPE:
return emitBuiltinType(regs, build, nparams, ra, arg, argsOp, nresults);
case LBF_TYPEOF:
return emitBuiltinTypeof(regs, build, nparams, ra, arg, argsOp, nresults);
default:
LUAU_ASSERT(!"missing x64 lowering");
break;

45
CodeGen/src/EmitInstructionX64.cpp
View file

@ -18,51 +18,6 @@ namespace CodeGen
namespace X64
{
void emitInstNameCall(AssemblyBuilderX64& build, const Instruction* pc, int pcpos, const TValue* k, Label& next, Label& fallback)
{
int ra = LUAU_INSN_A(*pc);
int rb = LUAU_INSN_B(*pc);
uint32_t aux = pc[1];
Label secondfpath;
jumpIfTagIsNot(build, rb, LUA_TTABLE, fallback);
RegisterX64 table = r8;
build.mov(table, luauRegValue(rb));
// &h->node[tsvalue(kv)->hash & (sizenode(h) - 1)];
RegisterX64 node = rdx;
build.mov(node, qword[table + offsetof(Table, node)]);
build.mov(eax, 1);
build.mov(cl, byte[table + offsetof(Table, lsizenode)]);
build.shl(eax, cl);
build.dec(eax);
build.and_(eax, tsvalue(&k[aux])->hash);
build.shl(rax, kLuaNodeSizeLog2);
build.add(node, rax);
jumpIfNodeKeyNotInExpectedSlot(build, rax, node, luauConstantValue(aux), secondfpath);
setLuauReg(build, xmm0, ra + 1, luauReg(rb));
setLuauReg(build, xmm0, ra, luauNodeValue(node));
build.jmp(next);
build.setLabel(secondfpath);
jumpIfNodeHasNext(build, node, fallback);
callGetFastTmOrFallback(build, table, TM_INDEX, fallback);
jumpIfTagIsNot(build, rax, LUA_TTABLE, fallback);
build.mov(table, qword[rax + offsetof(TValue, value)]);
getTableNodeAtCachedSlot(build, rax, node, table, pcpos);
jumpIfNodeKeyNotInExpectedSlot(build, rax, node, luauConstantValue(aux), fallback);
setLuauReg(build, xmm0, ra + 1, luauReg(rb));
setLuauReg(build, xmm0, ra, luauNodeValue(node));
}
void emitInstCall(AssemblyBuilderX64& build, ModuleHelpers& helpers, const Instruction* pc, int pcpos)
{
int ra = LUAU_INSN_A(*pc);

1
CodeGen/src/EmitInstructionX64.h
View file

@ -21,7 +21,6 @@ namespace X64
class AssemblyBuilderX64;
void emitInstNameCall(AssemblyBuilderX64& build, const Instruction* pc, int pcpos, const TValue* k, Label& next, Label& fallback);
void emitInstCall(AssemblyBuilderX64& build, ModuleHelpers& helpers, const Instruction* pc, int pcpos);
void emitInstReturn(AssemblyBuilderX64& build, ModuleHelpers& helpers, const Instruction* pc, int pcpos);
void emitInstSetList(AssemblyBuilderX64& build, const Instruction* pc, Label& next);

33
CodeGen/src/IrAnalysis.cpp
View file

@ -124,6 +124,10 @@ static void requireVariadicSequence(RegisterSet& sourceRs, const RegisterSet& de
{
if (!defRs.varargSeq)
{
// Peel away registers from variadic sequence that we define
while (defRs.regs.test(varargStart))
varargStart++;
LUAU_ASSERT(!sourceRs.varargSeq || sourceRs.varargStart == varargStart);
sourceRs.varargSeq = true;
@ -296,11 +300,6 @@ static RegisterSet computeBlockLiveInRegSet(IrFunction& function, const IrBlock&
use(inst.b);
useRange(inst.c.index, function.intOp(inst.d));
break;
case IrCmd::LOP_NAMECALL:
use(inst.c);
defRange(inst.b.index, 2);
break;
case IrCmd::LOP_CALL:
use(inst.b);
useRange(inst.b.index + 1, function.intOp(inst.c));
@ -411,6 +410,13 @@ static RegisterSet computeBlockLiveInRegSet(IrFunction& function, const IrBlock&
break;
default:
// All instructions which reference registers have to be handled explicitly
LUAU_ASSERT(inst.a.kind != IrOpKind::VmReg);
LUAU_ASSERT(inst.b.kind != IrOpKind::VmReg);
LUAU_ASSERT(inst.c.kind != IrOpKind::VmReg);
LUAU_ASSERT(inst.d.kind != IrOpKind::VmReg);
LUAU_ASSERT(inst.e.kind != IrOpKind::VmReg);
LUAU_ASSERT(inst.f.kind != IrOpKind::VmReg);
break;
}
}
@ -430,17 +436,20 @@ static void computeCfgLiveInOutRegSets(IrFunction& function)
{
CfgInfo& info = function.cfg;
// Clear existing data
// 'in' and 'captured' data is not cleared because it will be overwritten below
info.def.clear();
info.out.clear();
// Try to compute Luau VM register use-def info
info.in.resize(function.blocks.size());
info.def.resize(function.blocks.size());
info.out.resize(function.blocks.size());
// Captured registers are tracked for the whole function
// It should be possible to have a more precise analysis for them in the future
std::bitset<256> capturedRegs;
std::vector<RegisterSet> defRss;
defRss.resize(function.blocks.size());
// First we compute live-in set of each block
for (size_t blockIdx = 0; blockIdx < function.blocks.size(); blockIdx++)
{
@ -449,7 +458,7 @@ static void computeCfgLiveInOutRegSets(IrFunction& function)
if (block.kind == IrBlockKind::Dead)
continue;
info.in[blockIdx] = computeBlockLiveInRegSet(function, block, defRss[blockIdx], capturedRegs);
info.in[blockIdx] = computeBlockLiveInRegSet(function, block, info.def[blockIdx], capturedRegs);
}
info.captured.regs = capturedRegs;
@ -480,8 +489,8 @@ static void computeCfgLiveInOutRegSets(IrFunction& function)
IrBlock& curr = function.blocks[blockIdx];
RegisterSet& inRs = info.in[blockIdx];
RegisterSet& defRs = info.def[blockIdx];
RegisterSet& outRs = info.out[blockIdx];
RegisterSet& defRs = defRss[blockIdx];
// Current block has to provide all registers in successor blocks
for (uint32_t succIdx : successors(info, blockIdx))
@ -547,6 +556,10 @@ static void computeCfgBlockEdges(IrFunction& function)
{
CfgInfo& info = function.cfg;
// Clear existing data
info.predecessorsOffsets.clear();
info.successorsOffsets.clear();
// Compute predecessors block edges
info.predecessorsOffsets.reserve(function.blocks.size());
info.successorsOffsets.reserve(function.blocks.size());

47
CodeGen/src/IrBuilder.cpp
View file

@ -1,8 +1,6 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Luau/IrBuilder.h"
#include "Luau/Common.h"
#include "Luau/DenseHash.h"
#include "Luau/IrAnalysis.h"
#include "Luau/IrUtils.h"
@ -11,6 +9,8 @@
#include "lapi.h"
#include <string.h>
namespace Luau
{
namespace CodeGen
@ -18,6 +18,11 @@ namespace CodeGen
constexpr unsigned kNoAssociatedBlockIndex = ~0u;
IrBuilder::IrBuilder()
: constantMap({IrConstKind::Bool, ~0ull})
{
}
void IrBuilder::buildFunctionIr(Proto* proto)
{
function.proto = proto;
@ -377,19 +382,8 @@ void IrBuilder::translateInst(LuauOpcode op, const Instruction* pc, int i)
translateInstCapture(*this, pc, i);
break;
case LOP_NAMECALL:
{
IrOp next = blockAtInst(i + getOpLength(LOP_NAMECALL));
IrOp fallback = block(IrBlockKind::Fallback);
inst(IrCmd::LOP_NAMECALL, constUint(i), vmReg(LUAU_INSN_A(*pc)), vmReg(LUAU_INSN_B(*pc)), next, fallback);
beginBlock(fallback);
inst(IrCmd::FALLBACK_NAMECALL, constUint(i), vmReg(LUAU_INSN_A(*pc)), vmReg(LUAU_INSN_B(*pc)), vmConst(pc[1]));
inst(IrCmd::JUMP, next);
beginBlock(next);
translateInstNamecall(*this, pc, i);
break;
}
case LOP_PREPVARARGS:
inst(IrCmd::FALLBACK_PREPVARARGS, constUint(i), constInt(LUAU_INSN_A(*pc)));
break;
@ -501,7 +495,7 @@ IrOp IrBuilder::constBool(bool value)
IrConst constant;
constant.kind = IrConstKind::Bool;
constant.valueBool = value;
return constAny(constant);
return constAny(constant, uint64_t(value));
}
IrOp IrBuilder::constInt(int value)
@ -509,7 +503,7 @@ IrOp IrBuilder::constInt(int value)
IrConst constant;
constant.kind = IrConstKind::Int;
constant.valueInt = value;
return constAny(constant);
return constAny(constant, uint64_t(value));
}
IrOp IrBuilder::constUint(unsigned value)
@ -517,7 +511,7 @@ IrOp IrBuilder::constUint(unsigned value)
IrConst constant;
constant.kind = IrConstKind::Uint;
constant.valueUint = value;
return constAny(constant);
return constAny(constant, uint64_t(value));
}
IrOp IrBuilder::constDouble(double value)
@ -525,7 +519,12 @@ IrOp IrBuilder::constDouble(double value)
IrConst constant;
constant.kind = IrConstKind::Double;
constant.valueDouble = value;
return constAny(constant);
uint64_t asCommonKey;
static_assert(sizeof(asCommonKey) == sizeof(value), "Expecting double to be 64-bit");
memcpy(&asCommonKey, &value, sizeof(value));
return constAny(constant, asCommonKey);
}
IrOp IrBuilder::constTag(uint8_t value)
@ -533,13 +532,21 @@ IrOp IrBuilder::constTag(uint8_t value)
IrConst constant;
constant.kind = IrConstKind::Tag;
constant.valueTag = value;
return constAny(constant);
return constAny(constant, uint64_t(value));
}
IrOp IrBuilder::constAny(IrConst constant)
IrOp IrBuilder::constAny(IrConst constant, uint64_t asCommonKey)
{
ConstantKey key{constant.kind, asCommonKey};
if (uint32_t* cache = constantMap.find(key))
return {IrOpKind::Constant, *cache};
uint32_t index = uint32_t(function.constants.size());
function.constants.push_back(constant);
constantMap[key] = index;
return {IrOpKind::Constant, index};
}

129
CodeGen/src/IrDump.cpp
View file

@ -90,6 +90,8 @@ const char* getCmdName(IrCmd cmd)
return "GET_ARR_ADDR";
case IrCmd::GET_SLOT_NODE_ADDR:
return "GET_SLOT_NODE_ADDR";
case IrCmd::GET_HASH_NODE_ADDR:
return "GET_HASH_NODE_ADDR";
case IrCmd::STORE_TAG:
return "STORE_TAG";
case IrCmd::STORE_POINTER:
@ -142,14 +144,18 @@ const char* getCmdName(IrCmd cmd)
return "JUMP_CMP_NUM";
case IrCmd::JUMP_CMP_ANY:
return "JUMP_CMP_ANY";
case IrCmd::JUMP_SLOT_MATCH:
return "JUMP_SLOT_MATCH";
case IrCmd::TABLE_LEN:
return "TABLE_LEN";
case IrCmd::NEW_TABLE:
return "NEW_TABLE";
case IrCmd::DUP_TABLE:
return "DUP_TABLE";
case IrCmd::NUM_TO_INDEX:
return "NUM_TO_INDEX";
case IrCmd::TRY_NUM_TO_INDEX:
return "TRY_NUM_TO_INDEX";
case IrCmd::TRY_CALL_FASTGETTM:
return "TRY_CALL_FASTGETTM";
case IrCmd::INT_TO_NUM:
return "INT_TO_NUM";
case IrCmd::ADJUST_STACK_TO_REG:
@ -192,6 +198,8 @@ const char* getCmdName(IrCmd cmd)
return "CHECK_ARRAY_SIZE";
case IrCmd::CHECK_SLOT_MATCH:
return "CHECK_SLOT_MATCH";
case IrCmd::CHECK_NODE_NO_NEXT:
return "CHECK_NODE_NO_NEXT";
case IrCmd::INTERRUPT:
return "INTERRUPT";
case IrCmd::CHECK_GC:
@ -210,8 +218,6 @@ const char* getCmdName(IrCmd cmd)
return "CAPTURE";
case IrCmd::LOP_SETLIST:
return "LOP_SETLIST";
case IrCmd::LOP_NAMECALL:
return "LOP_NAMECALL";
case IrCmd::LOP_CALL:
return "LOP_CALL";
case IrCmd::LOP_RETURN:
@ -397,7 +403,7 @@ static void appendBlockSet(IrToStringContext& ctx, BlockIteratorWrapper blocks)
}
}
static void appendRegisterSet(IrToStringContext& ctx, const RegisterSet& rs)
static void appendRegisterSet(IrToStringContext& ctx, const RegisterSet& rs, const char* separator)
{
bool comma = false;
@ -406,7 +412,7 @@ static void appendRegisterSet(IrToStringContext& ctx, const RegisterSet& rs)
if (rs.regs.test(i))
{
if (comma)
append(ctx.result, ", ");
ctx.result.append(separator);
comma = true;
append(ctx.result, "R%d", int(i));
@ -416,7 +422,7 @@ static void appendRegisterSet(IrToStringContext& ctx, const RegisterSet& rs)
if (rs.varargSeq)
{
if (comma)
append(ctx.result, ", ");
ctx.result.append(separator);
append(ctx.result, "R%d...", rs.varargStart);
}
@ -428,7 +434,7 @@ void toStringDetailed(IrToStringContext& ctx, const IrBlock& block, uint32_t ind
if (block.useCount == 0 && block.kind != IrBlockKind::Dead && ctx.cfg.captured.regs.any())
{
append(ctx.result, "; captured regs: ");
appendRegisterSet(ctx, ctx.cfg.captured);
appendRegisterSet(ctx, ctx.cfg.captured, ", ");
append(ctx.result, "\n\n");
}
@ -484,7 +490,7 @@ void toStringDetailed(IrToStringContext& ctx, const IrBlock& block, uint32_t ind
if (in.regs.any() || in.varargSeq)
{
append(ctx.result, "; in regs: ");
appendRegisterSet(ctx, in);
appendRegisterSet(ctx, in, ", ");
append(ctx.result, "\n");
}
}
@ -497,7 +503,7 @@ void toStringDetailed(IrToStringContext& ctx, const IrBlock& block, uint32_t ind
if (out.regs.any() || out.varargSeq)
{
append(ctx.result, "; out regs: ");
appendRegisterSet(ctx, out);
appendRegisterSet(ctx, out, ", ");
append(ctx.result, "\n");
}
}
@ -551,5 +557,108 @@ std::string dump(IrFunction& function)
return result;
}
std::string toDot(IrFunction& function, bool includeInst)
{
std::string result;
IrToStringContext ctx{result, function.blocks, function.constants, function.cfg};
auto appendLabelRegset = [&ctx](std::vector<RegisterSet>& regSets, size_t blockIdx, const char* name) {
if (blockIdx < regSets.size())
{
const RegisterSet& rs = regSets[blockIdx];
if (rs.regs.any() || rs.varargSeq)
{
append(ctx.result, "|{%s|", name);
appendRegisterSet(ctx, rs, "|");
append(ctx.result, "}");
}
}
};
append(ctx.result, "digraph CFG {\n");
append(ctx.result, "node[shape=record]\n");
for (size_t i = 0; i < function.blocks.size(); i++)
{
IrBlock& block = function.blocks[i];
append(ctx.result, "b%u [", unsigned(i));
if (block.kind == IrBlockKind::Fallback)
append(ctx.result, "style=filled;fillcolor=salmon;");
else if (block.kind == IrBlockKind::Bytecode)
append(ctx.result, "style=filled;fillcolor=palegreen;");
append(ctx.result, "label=\"{");
toString(ctx, block, uint32_t(i));
appendLabelRegset(ctx.cfg.in, i, "in");
if (includeInst && block.start != ~0u)
{
for (uint32_t instIdx = block.start; instIdx <= block.finish; instIdx++)
{
IrInst& inst = function.instructions[instIdx];
// Skip pseudo instructions unless they are still referenced
if (isPseudo(inst.cmd) && inst.useCount == 0)
continue;
append(ctx.result, "|");
toString(ctx, inst, instIdx);
}
}
appendLabelRegset(ctx.cfg.def, i, "def");
appendLabelRegset(ctx.cfg.out, i, "out");
append(ctx.result, "}\"];\n");
}
for (size_t i = 0; i < function.blocks.size(); i++)
{
IrBlock& block = function.blocks[i];
if (block.start == ~0u)
continue;
for (uint32_t instIdx = block.start; instIdx != ~0u && instIdx <= block.finish; instIdx++)
{
IrInst& inst = function.instructions[instIdx];
auto checkOp = [&](IrOp op) {
if (op.kind == IrOpKind::Block)
{
if (function.blocks[op.index].kind != IrBlockKind::Fallback)
append(ctx.result, "b%u -> b%u [weight=10];\n", unsigned(i), op.index);
else
append(ctx.result, "b%u -> b%u;\n", unsigned(i), op.index);
}
};
checkOp(inst.a);
checkOp(inst.b);
checkOp(inst.c);
checkOp(inst.d);
checkOp(inst.e);
checkOp(inst.f);
}
}
append(ctx.result, "}\n");
return result;
}
std::string dumpDot(IrFunction& function, bool includeInst)
{
std::string result = toDot(function, includeInst);
printf("%s\n", result.c_str());
return result;
}
} // namespace CodeGen
} // namespace Luau

58
CodeGen/src/IrLoweringX64.cpp
View file

@ -200,6 +200,10 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
build.mov(inst.regX64, luauRegValue(inst.a.index));
else if (inst.a.kind == IrOpKind::VmConst)
build.mov(inst.regX64, luauConstantValue(inst.a.index));
// If we have a register, we assume it's a pointer to TValue
// We might introduce explicit operand types in the future to make this more robust
else if (inst.a.kind == IrOpKind::Inst)
build.mov(inst.regX64, qword[regOp(inst.a) + offsetof(TValue, value)]);
else
LUAU_ASSERT(!"Unsupported instruction form");
break;
@ -277,6 +281,25 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
getTableNodeAtCachedSlot(build, tmp.reg, inst.regX64, regOp(inst.a), uintOp(inst.b));
break;
}
case IrCmd::GET_HASH_NODE_ADDR:
{
inst.regX64 = regs.allocGprReg(SizeX64::qword);
// Custom bit shift value can only be placed in cl
ScopedRegX64 shiftTmp{regs, regs.takeGprReg(rcx)};
ScopedRegX64 tmp{regs, SizeX64::qword};
build.mov(inst.regX64, qword[regOp(inst.a) + offsetof(Table, node)]);
build.mov(dwordReg(tmp.reg), 1);
build.mov(byteReg(shiftTmp.reg), byte[regOp(inst.a) + offsetof(Table, lsizenode)]);
build.shl(dwordReg(tmp.reg), byteReg(shiftTmp.reg));
build.dec(dwordReg(tmp.reg));
build.and_(dwordReg(tmp.reg), uintOp(inst.b));
build.shl(tmp.reg, kLuaNodeSizeLog2);
build.add(inst.regX64, tmp.reg);
break;
};
case IrCmd::STORE_TAG:
LUAU_ASSERT(inst.a.kind == IrOpKind::VmReg);
@ -686,6 +709,16 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
jumpOrFallthrough(blockOp(inst.e), next);
break;
}
case IrCmd::JUMP_SLOT_MATCH:
{
LUAU_ASSERT(inst.b.kind == IrOpKind::VmConst);
ScopedRegX64 tmp{regs, SizeX64::qword};
jumpIfNodeKeyNotInExpectedSlot(build, tmp.reg, regOp(inst.a), luauConstantValue(inst.b.index), labelOp(inst.d));
jumpOrFallthrough(blockOp(inst.c), next);
break;
}
case IrCmd::TABLE_LEN:
inst.regX64 = regs.allocXmmReg();
@ -715,7 +748,7 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
if (inst.regX64 != rax)
build.mov(inst.regX64, rax);
break;
case IrCmd::NUM_TO_INDEX:
case IrCmd::TRY_NUM_TO_INDEX:
{
inst.regX64 = regs.allocGprReg(SizeX64::dword);
@ -724,6 +757,16 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
convertNumberToIndexOrJump(build, tmp.reg, regOp(inst.a), inst.regX64, labelOp(inst.b));
break;
}
case IrCmd::TRY_CALL_FASTGETTM:
{
inst.regX64 = regs.allocGprReg(SizeX64::qword);
callGetFastTmOrFallback(build, regOp(inst.a), TMS(intOp(inst.b)), labelOp(inst.c));
if (inst.regX64 != rax)
build.mov(inst.regX64, rax);
break;
}
case IrCmd::INT_TO_NUM:
inst.regX64 = regs.allocXmmReg();
@ -1017,6 +1060,9 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
jumpIfNodeKeyNotInExpectedSlot(build, tmp.reg, regOp(inst.a), luauConstantValue(inst.b.index), labelOp(inst.c));
break;
}
case IrCmd::CHECK_NODE_NO_NEXT:
jumpIfNodeHasNext(build, regOp(inst.a), labelOp(inst.b));
break;
case IrCmd::INTERRUPT:
emitInterrupt(build, uintOp(inst.a));
break;
@ -1114,16 +1160,6 @@ void IrLoweringX64::lowerInst(IrInst& inst, uint32_t index, IrBlock& next)
build.setLabel(next);
break;
}
case IrCmd::LOP_NAMECALL:
{
const Instruction* pc = proto->code + uintOp(inst.a);
LUAU_ASSERT(inst.b.kind == IrOpKind::VmReg);
LUAU_ASSERT(inst.c.kind == IrOpKind::VmReg);
emitInstNameCall(build, pc, uintOp(inst.a), proto->k, blockOp(inst.d).label, blockOp(inst.e).label);
jumpOrFallthrough(blockOp(inst.d), next);
break;
}
case IrCmd::LOP_CALL:
{
const Instruction* pc = proto->code + uintOp(inst.a);

32
CodeGen/src/IrTranslateBuiltins.cpp
View file

@ -210,6 +210,34 @@ BuiltinImplResult translateBuiltinMathClamp(IrBuilder& build, int nparams, int r
return {BuiltinImplType::UsesFallback, 1};
}
BuiltinImplResult translateBuiltinType(IrBuilder& build, int nparams, int ra, int arg, IrOp args, int nresults, IrOp fallback)
{
if (nparams < 1 || nresults > 1)
return {BuiltinImplType::None, -1};
build.inst(
IrCmd::FASTCALL, build.constUint(LBF_TYPE), build.vmReg(ra), build.vmReg(arg), args, build.constInt(nparams), build.constInt(nresults));
// TODO: tag update might not be required, we place it here now because FASTCALL is not modeled in constant propagation yet
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TSTRING));
return {BuiltinImplType::UsesFallback, 1};
}
BuiltinImplResult translateBuiltinTypeof(IrBuilder& build, int nparams, int ra, int arg, IrOp args, int nresults, IrOp fallback)
{
if (nparams < 1 || nresults > 1)
return {BuiltinImplType::None, -1};
build.inst(
IrCmd::FASTCALL, build.constUint(LBF_TYPEOF), build.vmReg(ra), build.vmReg(arg), args, build.constInt(nparams), build.constInt(nresults));
// TODO: tag update might not be required, we place it here now because FASTCALL is not modeled in constant propagation yet
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TSTRING));
return {BuiltinImplType::UsesFallback, 1};
}
BuiltinImplResult translateBuiltin(IrBuilder& build, int bfid, int ra, int arg, IrOp args, int nparams, int nresults, IrOp fallback)
{
switch (bfid)
@ -254,6 +282,10 @@ BuiltinImplResult translateBuiltin(IrBuilder& build, int bfid, int ra, int arg,
case LBF_MATH_FREXP:
case LBF_MATH_MODF:
return translateBuiltinNumberTo2Number(build, LuauBuiltinFunction(bfid), nparams, ra, arg, args, nresults, fallback);
case LBF_TYPE:
return translateBuiltinType(build, nparams, ra, arg, args, nresults, fallback);
case LBF_TYPEOF:
return translateBuiltinTypeof(build, nparams, ra, arg, args, nresults, fallback);
default:
return {BuiltinImplType::None, -1};
}

62
CodeGen/src/IrTranslation.cpp
View file

@ -806,7 +806,7 @@ void translateInstGetTable(IrBuilder& build, const Instruction* pc, int pcpos)
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
IrOp vc = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rc));
IrOp index = build.inst(IrCmd::NUM_TO_INDEX, vc, fallback);
IrOp index = build.inst(IrCmd::TRY_NUM_TO_INDEX, vc, fallback);
index = build.inst(IrCmd::SUB_INT, index, build.constInt(1));
@ -843,7 +843,7 @@ void translateInstSetTable(IrBuilder& build, const Instruction* pc, int pcpos)
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
IrOp vc = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rc));
IrOp index = build.inst(IrCmd::NUM_TO_INDEX, vc, fallback);
IrOp index = build.inst(IrCmd::TRY_NUM_TO_INDEX, vc, fallback);
index = build.inst(IrCmd::SUB_INT, index, build.constInt(1));
@ -1035,5 +1035,63 @@ void translateInstCapture(IrBuilder& build, const Instruction* pc, int pcpos)
}
}
void translateInstNamecall(IrBuilder& build, const Instruction* pc, int pcpos)
{
int ra = LUAU_INSN_A(*pc);
int rb = LUAU_INSN_B(*pc);
uint32_t aux = pc[1];
IrOp next = build.blockAtInst(pcpos + getOpLength(LOP_NAMECALL));
IrOp fallback = build.block(IrBlockKind::Fallback);
IrOp firstFastPathSuccess = build.block(IrBlockKind::Internal);
IrOp secondFastPath = build.block(IrBlockKind::Internal);
build.loadAndCheckTag(build.vmReg(rb), LUA_TTABLE, fallback);
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
LUAU_ASSERT(build.function.proto);
IrOp addrNodeEl = build.inst(IrCmd::GET_HASH_NODE_ADDR, table, build.constUint(tsvalue(&build.function.proto->k[aux])->hash));
// We use 'jump' version instead of 'check' guard because we are jumping away into a non-fallback block
// This is required by CFG live range analysis because both non-fallback blocks define the same registers
build.inst(IrCmd::JUMP_SLOT_MATCH, addrNodeEl, build.vmConst(aux), firstFastPathSuccess, secondFastPath);
build.beginBlock(firstFastPathSuccess);
build.inst(IrCmd::STORE_POINTER, build.vmReg(ra + 1), table);
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 1), build.constTag(LUA_TTABLE));
IrOp nodeEl = build.inst(IrCmd::LOAD_NODE_VALUE_TV, addrNodeEl);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), nodeEl);
build.inst(IrCmd::JUMP, next);
build.beginBlock(secondFastPath);
build.inst(IrCmd::CHECK_NODE_NO_NEXT, addrNodeEl, fallback);
IrOp indexPtr = build.inst(IrCmd::TRY_CALL_FASTGETTM, table, build.constInt(TM_INDEX), fallback);
build.loadAndCheckTag(indexPtr, LUA_TTABLE, fallback);
IrOp index = build.inst(IrCmd::LOAD_POINTER, indexPtr);
IrOp addrIndexNodeEl = build.inst(IrCmd::GET_SLOT_NODE_ADDR, index, build.constUint(pcpos));
build.inst(IrCmd::CHECK_SLOT_MATCH, addrIndexNodeEl, build.vmConst(aux), fallback);
// TODO: original 'table' was clobbered by a call inside 'FASTGETTM'
// Ideally, such calls should have to effect on SSA IR values, but simple register allocator doesn't support it
IrOp table2 = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
build.inst(IrCmd::STORE_POINTER, build.vmReg(ra + 1), table2);
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 1), build.constTag(LUA_TTABLE));
IrOp indexNodeEl = build.inst(IrCmd::LOAD_NODE_VALUE_TV, addrIndexNodeEl);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), indexNodeEl);
build.inst(IrCmd::JUMP, next);
build.beginBlock(fallback);
build.inst(IrCmd::FALLBACK_NAMECALL, build.constUint(pcpos), build.vmReg(ra), build.vmReg(rb), build.vmConst(aux));
build.inst(IrCmd::JUMP, next);
build.beginBlock(next);
}
} // namespace CodeGen
} // namespace Luau

1
CodeGen/src/IrTranslation.h
View file

@ -60,6 +60,7 @@ void translateInstGetGlobal(IrBuilder& build, const Instruction* pc, int pcpos);
void translateInstSetGlobal(IrBuilder& build, const Instruction* pc, int pcpos);
void translateInstConcat(IrBuilder& build, const Instruction* pc, int pcpos);
void translateInstCapture(IrBuilder& build, const Instruction* pc, int pcpos);
void translateInstNamecall(IrBuilder& build, const Instruction* pc, int pcpos);
} // namespace CodeGen
} // namespace Luau

2
CodeGen/src/IrUtils.cpp
View file

@ -360,7 +360,7 @@ void foldConstants(IrBuilder& build, IrFunction& function, IrBlock& block, uint3
replace(function, block, index, {IrCmd::JUMP, inst.e});
}
break;
case IrCmd::NUM_TO_INDEX:
case IrCmd::TRY_NUM_TO_INDEX:
if (inst.a.kind == IrOpKind::Constant)
{
double value = function.doubleOp(inst.a);

1
CodeGen/src/NativeState.cpp
View file

@ -80,6 +80,7 @@ void initHelperFunctions(NativeState& data)
data.context.luaF_close = luaF_close;
data.context.luaT_gettm = luaT_gettm;
data.context.luaT_objtypenamestr = luaT_objtypenamestr;
data.context.libm_exp = exp;
data.context.libm_pow = pow;

2
CodeGen/src/NativeState.h
View file

@ -39,7 +39,6 @@ struct NativeProto
uintptr_t* instTargets = nullptr; // TODO: NativeProto should be variable-size with all target embedded
Proto* proto = nullptr;
uint32_t location = 0;
};
struct NativeContext
@ -79,6 +78,7 @@ struct NativeContext
void (*luaF_close)(lua_State* L, StkId level) = nullptr;
const TValue* (*luaT_gettm)(Table* events, TMS event, TString* ename) = nullptr;
const TString* (*luaT_objtypenamestr)(lua_State* L, const TValue* o) = nullptr;
double (*libm_exp)(double) = nullptr;
double (*libm_pow)(double, double) = nullptr;

19
CodeGen/src/OptimizeConstProp.cpp
View file

@ -319,10 +319,7 @@ static void constPropInInst(ConstPropState& state, IrBuilder& build, IrFunction&
{
if (inst.b.kind == IrOpKind::Constant)
{
std::optional<double> oldValue = function.asDoubleOp(state.tryGetValue(inst.a));
double newValue = function.doubleOp(inst.b);
if (oldValue && *oldValue == newValue)
if (state.tryGetValue(inst.a) == inst.b)
kill(function, inst);
else
state.saveValue(inst.a, inst.b);
@ -338,10 +335,7 @@ static void constPropInInst(ConstPropState& state, IrBuilder& build, IrFunction&
{
if (inst.b.kind == IrOpKind::Constant)
{
std::optional<int> oldValue = function.asIntOp(state.tryGetValue(inst.a));
int newValue = function.intOp(inst.b);
if (oldValue && *oldValue == newValue)
if (state.tryGetValue(inst.a) == inst.b)
kill(function, inst);
else
state.saveValue(inst.a, inst.b);
@ -504,6 +498,7 @@ static void constPropInInst(ConstPropState& state, IrBuilder& build, IrFunction&
case IrCmd::LOAD_ENV:
case IrCmd::GET_ARR_ADDR:
case IrCmd::GET_SLOT_NODE_ADDR:
case IrCmd::GET_HASH_NODE_ADDR:
case IrCmd::STORE_NODE_VALUE_TV:
case IrCmd::ADD_INT:
case IrCmd::SUB_INT:
@ -519,13 +514,16 @@ static void constPropInInst(ConstPropState& state, IrBuilder& build, IrFunction&
case IrCmd::NOT_ANY:
case IrCmd::JUMP:
case IrCmd::JUMP_EQ_POINTER:
case IrCmd::JUMP_SLOT_MATCH:
case IrCmd::TABLE_LEN:
case IrCmd::NEW_TABLE:
case IrCmd::DUP_TABLE:
case IrCmd::NUM_TO_INDEX:
case IrCmd::TRY_NUM_TO_INDEX:
case IrCmd::TRY_CALL_FASTGETTM:
case IrCmd::INT_TO_NUM:
case IrCmd::CHECK_ARRAY_SIZE:
case IrCmd::CHECK_SLOT_MATCH:
case IrCmd::CHECK_NODE_NO_NEXT:
case IrCmd::BARRIER_TABLE_BACK:
case IrCmd::LOP_RETURN:
case IrCmd::LOP_COVERAGE:
@ -552,7 +550,6 @@ static void constPropInInst(ConstPropState& state, IrBuilder& build, IrFunction&
case IrCmd::CONCAT:
case IrCmd::PREPARE_FORN:
case IrCmd::INTERRUPT: // TODO: it will be important to keep tag/value state, but we have to track register capture
case IrCmd::LOP_NAMECALL:
case IrCmd::LOP_CALL:
case IrCmd::LOP_FORGLOOP:
case IrCmd::LOP_FORGLOOP_FALLBACK:
@ -633,7 +630,7 @@ static std::vector<uint32_t> collectDirectBlockJumpPath(IrFunction& function, st
// * if the successor has multiple uses, it can't have such 'live in' values without phi nodes that we don't have yet
// Another possibility is to have two paths from 'block' into the target through two intermediate blocks
// Usually that would mean that we would have a conditional jump at the end of 'block'
// But using check guards and fallback clocks it becomes a possible setup
// But using check guards and fallback blocks it becomes a possible setup
// We avoid this by making sure fallbacks rejoin the other immediate successor of 'block'
LUAU_ASSERT(getLiveOutValueCount(function, *block) == 0);

3
CodeGen/src/UnwindBuilderDwarf2.cpp
View file

@ -201,6 +201,7 @@ void UnwindBuilderDwarf2::setupFrameReg(X64::RegisterX64 reg, int espOffset)
void UnwindBuilderDwarf2::finish()
{
LUAU_ASSERT(stackOffset % 16 == 0 && "stack has to be aligned to 16 bytes after prologue");
LUAU_ASSERT(fdeEntryStart != nullptr);
pos = alignPosition(fdeEntryStart, pos);
writeu32(fdeEntryStart, unsigned(pos - fdeEntryStart - 4)); // Length field itself is excluded from length
@ -220,7 +221,9 @@ void UnwindBuilderDwarf2::finalize(char* target, void* funcAddress, size_t funcS
{
memcpy(target, rawData, getSize());
LUAU_ASSERT(fdeEntryStart != nullptr);
unsigned fdeEntryStartPos = unsigned(fdeEntryStart - rawData);
writeu64((uint8_t*)target + fdeEntryStartPos + kFdeInitialLocationOffset, uintptr_t(funcAddress));
writeu64((uint8_t*)target + fdeEntryStartPos + kFdeAddressRangeOffset, funcSize);
}

6
Common/include/Luau/Bytecode.h
View file

@ -25,7 +25,7 @@
// Additionally, in some specific instructions such as ANDK, the limit on the encoded value is smaller; this means that if a value is larger, a different instruction must be selected.
//
// Registers: 0-254. Registers refer to the values on the function's stack frame, including arguments.
// Upvalues: 0-254. Upvalues refer to the values stored in the closure object.
// Upvalues: 0-199. Upvalues refer to the values stored in the closure object.
// Constants: 0-2^23-1. Constants are stored in a table allocated with each proto; to allow for future bytecode tweaks the encodable value is limited to 23 bits.
// Closures: 0-2^15-1. Closures are created from child protos via a child index; the limit is for the number of closures immediately referenced in each function.
// Jumps: -2^23..2^23. Jump offsets are specified in word increments, so jumping over an instruction may sometimes require an offset of 2 or more. Note that for jump instructions with AUX, the AUX word is included as part of the jump offset.
@ -93,12 +93,12 @@ enum LuauOpcode
// GETUPVAL: load upvalue from the upvalue table for the current function
// A: target register
// B: upvalue index (0..255)
// B: upvalue index
LOP_GETUPVAL,
// SETUPVAL: store value into the upvalue table for the current function
// A: target register
// B: upvalue index (0..255)
// B: upvalue index
LOP_SETUPVAL,
// CLOSEUPVALS: close (migrate to heap) all upvalues that were captured for registers >= target

5
Common/include/Luau/ExperimentalFlags.h
View file

@ -11,8 +11,9 @@ inline bool isFlagExperimental(const char* flag)
// Flags in this list are disabled by default in various command-line tools. They may have behavior that is not fully final,
// or critical bugs that are found after the code has been submitted.
static const char* const kList[] = {
"LuauInstantiateInSubtyping", // requires some fixes to lua-apps code
"LuauTypecheckTypeguards", // requires some fixes to lua-apps code (CLI-67030)
"LuauInstantiateInSubtyping", // requires some fixes to lua-apps code
"LuauTypecheckTypeguards", // requires some fixes to lua-apps code (CLI-67030)
"LuauTinyControlFlowAnalysis", // waiting for updates to packages depended by internal builtin plugins
// makes sure we always have at least one entry
nullptr,
};

3
Compiler/src/Compiler.cpp
View file

@ -25,7 +25,6 @@ LUAU_FASTINTVARIABLE(LuauCompileInlineThreshold, 25)
LUAU_FASTINTVARIABLE(LuauCompileInlineThresholdMaxBoost, 300)
LUAU_FASTINTVARIABLE(LuauCompileInlineDepth, 5)
LUAU_FASTFLAGVARIABLE(LuauCompileTerminateBC, false)
LUAU_FASTFLAGVARIABLE(LuauCompileBuiltinArity, false)
namespace Luau
@ -143,7 +142,7 @@ struct Compiler
return stat->body.size > 0 && alwaysTerminates(stat->body.data[stat->body.size - 1]);
else if (node->is<AstStatReturn>())
return true;
else if (FFlag::LuauCompileTerminateBC && (node->is<AstStatBreak>() || node->is<AstStatContinue>()))
else if (node->is<AstStatBreak>() || node->is<AstStatContinue>())
return true;
else if (AstStatIf* stat = node->as<AstStatIf>())
return stat->elsebody && alwaysTerminates(stat->thenbody) && alwaysTerminates(stat->elsebody);

3
Makefile
View file

@ -143,6 +143,9 @@ aliases: $(EXECUTABLE_ALIASES)
test: $(TESTS_TARGET)
$(TESTS_TARGET) $(TESTS_ARGS)
conformance: $(TESTS_TARGET)
$(TESTS_TARGET) $(TESTS_ARGS) -ts=Conformance
clean:
rm -rf $(BUILD)
rm -rf $(EXECUTABLE_ALIASES)

2
Sources.cmake
View file

@ -135,6 +135,7 @@ target_sources(Luau.Analysis PRIVATE
Analysis/include/Luau/Constraint.h
Analysis/include/Luau/ConstraintGraphBuilder.h
Analysis/include/Luau/ConstraintSolver.h
Analysis/include/Luau/ControlFlow.h
Analysis/include/Luau/DataFlowGraph.h
Analysis/include/Luau/DcrLogger.h
Analysis/include/Luau/Def.h
@ -370,6 +371,7 @@ if(TARGET Luau.UnitTest)
tests/TypeInfer.annotations.test.cpp
tests/TypeInfer.anyerror.test.cpp
tests/TypeInfer.builtins.test.cpp
tests/TypeInfer.cfa.test.cpp
tests/TypeInfer.classes.test.cpp
tests/TypeInfer.definitions.test.cpp
tests/TypeInfer.functions.test.cpp

34
VM/src/ltable.cpp
View file

@ -33,6 +33,8 @@
#include <string.h>
LUAU_FASTFLAGVARIABLE(LuauArrBoundResizeFix, false)
// max size of both array and hash part is 2^MAXBITS
#define MAXBITS 26
#define MAXSIZE (1 << MAXBITS)
@ -454,15 +456,43 @@ static void rehash(lua_State* L, Table* t, const TValue* ek)
int nasize = numusearray(t, nums); // count keys in array part
int totaluse = nasize; // all those keys are integer keys
totaluse += numusehash(t, nums, &nasize); // count keys in hash part
// count extra key
if (ttisnumber(ek))
nasize += countint(nvalue(ek), nums);
totaluse++;
// compute new size for array part
int na = computesizes(nums, &nasize);
int nh = totaluse - na;
// enforce the boundary invariant; for performance, only do hash lookups if we must
nasize = adjustasize(t, nasize, ek);
if (FFlag::LuauArrBoundResizeFix)
{
// enforce the boundary invariant; for performance, only do hash lookups if we must
int nadjusted = adjustasize(t, nasize, ek);
// count how many extra elements belong to array part instead of hash part
int aextra = nadjusted - nasize;
if (aextra != 0)
{
// we no longer need to store those extra array elements in hash part
nh -= aextra;
// because hash nodes are twice as large as array nodes, the memory we saved for hash parts can be used by array part
// this follows the general sparse array part optimization where array is allocated when 50% occupation is reached
nasize = nadjusted + aextra;
// since the size was changed, it's again important to enforce the boundary invariant at the new size
nasize = adjustasize(t, nasize, ek);
}
}
else
{
// enforce the boundary invariant; for performance, only do hash lookups if we must
nasize = adjustasize(t, nasize, ek);
}
// resize the table to new computed sizes
resize(L, t, nasize, nh);
}

46
tests/Compiler.test.cpp
View file

@ -1677,8 +1677,6 @@ RETURN R0 0
TEST_CASE("LoopBreak")
{
ScopedFastFlag sff("LuauCompileTerminateBC", true);
// default codegen: compile breaks as unconditional jumps
CHECK_EQ("\n" + compileFunction0("while true do if math.random() < 0.5 then break else end end"), R"(
L0: GETIMPORT R0 2 [math.random]
@ -1703,8 +1701,6 @@ L1: RETURN R0 0
TEST_CASE("LoopContinue")
{
ScopedFastFlag sff("LuauCompileTerminateBC", true);
// default codegen: compile continue as unconditional jumps
CHECK_EQ("\n" + compileFunction0("repeat if math.random() < 0.5 then continue else end break until false error()"), R"(
L0: GETIMPORT R0 2 [math.random]
@ -2214,6 +2210,46 @@ TEST_CASE("RecursionParse")
{
CHECK_EQ(std::string(e.what()), "Exceeded allowed recursion depth; simplify your block to make the code compile");
}
try
{
Luau::compileOrThrow(bcb, "local f: " + rep("(", 1500) + "nil" + rep(")", 1500));
CHECK(!"Expected exception");
}
catch (std::exception& e)
{
CHECK_EQ(std::string(e.what()), "Exceeded allowed recursion depth; simplify your type annotation to make the code compile");
}
try
{
Luau::compileOrThrow(bcb, "local f: () " + rep("-> ()", 1500));
CHECK(!"Expected exception");
}
catch (std::exception& e)
{
CHECK_EQ(std::string(e.what()), "Exceeded allowed recursion depth; simplify your type annotation to make the code compile");
}
try
{
Luau::compileOrThrow(bcb, "local f: " + rep("{x:", 1500) + "nil" + rep("}", 1500));
CHECK(!"Expected exception");
}
catch (std::exception& e)
{
CHECK_EQ(std::string(e.what()), "Exceeded allowed recursion depth; simplify your type annotation to make the code compile");
}
try
{
Luau::compileOrThrow(bcb, "local f: " + rep("(nil & ", 1500) + "nil" + rep(")", 1500));
CHECK(!"Expected exception");
}
catch (std::exception& e)
{
CHECK_EQ(std::string(e.what()), "Exceeded allowed recursion depth; simplify your type annotation to make the code compile");
}
}
TEST_CASE("ArrayIndexLiteral")
@ -6816,8 +6852,6 @@ RETURN R0 0
TEST_CASE("ElideJumpAfterIf")
{
ScopedFastFlag sff("LuauCompileTerminateBC", true);
// break refers to outer loop => we can elide unconditional branches
CHECK_EQ("\n" + compileFunction0(R"(
local foo, bar = ...

2
tests/ConstraintGraphBuilderFixture.cpp
View file

@ -13,7 +13,7 @@ ConstraintGraphBuilderFixture::ConstraintGraphBuilderFixture()
{
mainModule->reduction = std::make_unique<TypeReduction>(NotNull{&mainModule->internalTypes}, builtinTypes, NotNull{&ice});
BlockedType::nextIndex = 0;
BlockedType::DEPRECATED_nextIndex = 0;
BlockedTypePack::nextIndex = 0;
}

35
tests/Fixture.cpp
View file

@ -137,7 +137,7 @@ const Config& TestConfigResolver::getConfig(const ModuleName& name) const
Fixture::Fixture(bool freeze, bool prepareAutocomplete)
: sff_DebugLuauFreezeArena("DebugLuauFreezeArena", freeze)
, frontend(&fileResolver, &configResolver,
{/* retainFullTypeGraphs= */ true, /* forAutocomplete */ false, /* randomConstraintResolutionSeed */ randomSeed})
{/* retainFullTypeGraphs= */ true, /* forAutocomplete */ false, /* runLintChecks */ false, /* randomConstraintResolutionSeed */ randomSeed})
, builtinTypes(frontend.builtinTypes)
{
configResolver.defaultConfig.mode = Mode::Strict;
@ -173,15 +173,19 @@ AstStatBlock* Fixture::parse(const std::string& source, const ParseOptions& pars
// if AST is available, check how lint and typecheck handle error nodes
if (result.root)
{
frontend.lint(*sourceModule);
if (FFlag::DebugLuauDeferredConstraintResolution)
{
Luau::check(*sourceModule, {}, builtinTypes, NotNull{&ice}, NotNull{&moduleResolver}, NotNull{&fileResolver},
ModulePtr module = Luau::check(*sourceModule, {}, builtinTypes, NotNull{&ice}, NotNull{&moduleResolver}, NotNull{&fileResolver},
frontend.globals.globalScope, frontend.options);
Luau::lint(sourceModule->root, *sourceModule->names, frontend.globals.globalScope, module.get(), sourceModule->hotcomments, {});
}
else
frontend.typeChecker.check(*sourceModule, sourceModule->mode.value_or(Luau::Mode::Nonstrict));
{
ModulePtr module = frontend.typeChecker.check(*sourceModule, sourceModule->mode.value_or(Luau::Mode::Nonstrict));
Luau::lint(sourceModule->root, *sourceModule->names, frontend.globals.globalScope, module.get(), sourceModule->hotcomments, {});
}
}
throw ParseErrors(result.errors);
@ -209,20 +213,23 @@ CheckResult Fixture::check(const std::string& source)
LintResult Fixture::lint(const std::string& source, const std::optional<LintOptions>& lintOptions)
{
ParseOptions parseOptions;
parseOptions.captureComments = true;
configResolver.defaultConfig.mode = Mode::Nonstrict;
parse(source, parseOptions);
ModuleName mm = fromString(mainModuleName);
configResolver.defaultConfig.mode = Mode::Strict;
fileResolver.source[mm] = std::move(source);
frontend.markDirty(mm);
return frontend.lint(*sourceModule, lintOptions);
return lintModule(mm);
}
LintResult Fixture::lintTyped(const std::string& source, const std::optional<LintOptions>& lintOptions)
LintResult Fixture::lintModule(const ModuleName& moduleName, const std::optional<LintOptions>& lintOptions)
{
check(source);
ModuleName mm = fromString(mainModuleName);
FrontendOptions options = frontend.options;
options.runLintChecks = true;
options.enabledLintWarnings = lintOptions;
return frontend.lint(mm, lintOptions);
CheckResult result = frontend.check(moduleName, options);
return result.lintResult;
}
ParseResult Fixture::parseEx(const std::string& source, const ParseOptions& options)

3
tests/Fixture.h
View file

@ -66,7 +66,7 @@ struct Fixture
CheckResult check(const std::string& source);
LintResult lint(const std::string& source, const std::optional<LintOptions>& lintOptions = {});
LintResult lintTyped(const std::string& source, const std::optional<LintOptions>& lintOptions = {});
LintResult lintModule(const ModuleName& moduleName, const std::optional<LintOptions>& lintOptions = {});
/// Parse with all language extensions enabled
ParseResult parseEx(const std::string& source, const ParseOptions& parseOptions = {});
@ -94,6 +94,7 @@ struct Fixture
TypeId requireTypeAlias(const std::string& name);
ScopedFastFlag sff_DebugLuauFreezeArena;
ScopedFastFlag luauLintInTypecheck{"LuauLintInTypecheck", true};
TestFileResolver fileResolver;
TestConfigResolver configResolver;

42
tests/Frontend.test.cpp
View file

@ -456,16 +456,16 @@ TEST_CASE_FIXTURE(FrontendFixture, "dont_reparse_clean_file_when_linting")
end
)";
frontend.check("Modules/A");
configResolver.defaultConfig.enabledLint.enableWarning(LintWarning::Code_ForRange);
lintModule("Modules/A");
fileResolver.source["Modules/A"] = R"(
-- We have fixed the lint error, but we did not tell the Frontend that the file is changed!
-- Therefore, we expect Frontend to reuse the parse tree.
-- Therefore, we expect Frontend to reuse the results from previous lint.
)";
configResolver.defaultConfig.enabledLint.enableWarning(LintWarning::Code_ForRange);
LintResult lintResult = frontend.lint("Modules/A");
LintResult lintResult = lintModule("Modules/A");
CHECK_EQ(1, lintResult.warnings.size());
}
@ -760,25 +760,49 @@ TEST_CASE_FIXTURE(FrontendFixture, "test_lint_uses_correct_config")
configResolver.configFiles["Module/A"].enabledLint.enableWarning(LintWarning::Code_ForRange);
auto result = frontend.lint("Module/A");
auto result = lintModule("Module/A");
CHECK_EQ(1, result.warnings.size());
configResolver.configFiles["Module/A"].enabledLint.disableWarning(LintWarning::Code_ForRange);
frontend.markDirty("Module/A");
auto result2 = frontend.lint("Module/A");
auto result2 = lintModule("Module/A");
CHECK_EQ(0, result2.warnings.size());
LintOptions overrideOptions;
overrideOptions.enableWarning(LintWarning::Code_ForRange);
auto result3 = frontend.lint("Module/A", overrideOptions);
frontend.markDirty("Module/A");
auto result3 = lintModule("Module/A", overrideOptions);
CHECK_EQ(1, result3.warnings.size());
overrideOptions.disableWarning(LintWarning::Code_ForRange);
auto result4 = frontend.lint("Module/A", overrideOptions);
frontend.markDirty("Module/A");
auto result4 = lintModule("Module/A", overrideOptions);
CHECK_EQ(0, result4.warnings.size());
}
TEST_CASE_FIXTURE(FrontendFixture, "lint_results_are_only_for_checked_module")
{
fileResolver.source["Module/A"] = R"(
local _ = 0b10000000000000000000000000000000000000000000000000000000000000000
)";
fileResolver.source["Module/B"] = R"(
require(script.Parent.A)
local _ = 0x10000000000000000
)";
LintResult lintResult = lintModule("Module/B");
CHECK_EQ(1, lintResult.warnings.size());
// Check cached result
lintResult = lintModule("Module/B");
CHECK_EQ(1, lintResult.warnings.size());
}
TEST_CASE_FIXTURE(FrontendFixture, "discard_type_graphs")
{
Frontend fe{&fileResolver, &configResolver, {false}};

84
tests/IrBuilder.test.cpp
View file

@ -62,22 +62,16 @@ public:
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
};
void checkEq(IrOp lhs, IrOp rhs)
{
CHECK_EQ(lhs.kind, rhs.kind);
LUAU_ASSERT(lhs.kind != IrOpKind::Constant && "can't compare constants, each ref is unique");
CHECK_EQ(lhs.index, rhs.index);
}
void checkEq(IrOp instOp, const IrInst& inst)
{
const IrInst& target = build.function.instOp(instOp);
CHECK(target.cmd == inst.cmd);
checkEq(target.a, inst.a);
checkEq(target.b, inst.b);
checkEq(target.c, inst.c);
checkEq(target.d, inst.d);
checkEq(target.e, inst.e);
CHECK(target.a == inst.a);
CHECK(target.b == inst.b);
CHECK(target.c == inst.c);
CHECK(target.d == inst.d);
CHECK(target.e == inst.e);
CHECK(target.f == inst.f);
}
IrBuilder build;
@ -405,18 +399,18 @@ bb_11:
TEST_CASE_FIXTURE(IrBuilderFixture, "NumToIndex")
{
withOneBlock([this](IrOp a) {
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NUM_TO_INDEX, build.constDouble(4), a));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::TRY_NUM_TO_INDEX, build.constDouble(4), a));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
withOneBlock([this](IrOp a) {
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NUM_TO_INDEX, build.constDouble(1.2), a));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::TRY_NUM_TO_INDEX, build.constDouble(1.2), a));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
withOneBlock([this](IrOp a) {
IrOp nan = build.inst(IrCmd::DIV_NUM, build.constDouble(0.0), build.constDouble(0.0));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NUM_TO_INDEX, nan, a));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::TRY_NUM_TO_INDEX, nan, a));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
@ -1676,4 +1670,64 @@ bb_2:
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "VariadicSequencePeeling")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp a = build.block(IrBlockKind::Internal);
IrOp b = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::FALLBACK_GETVARARGS, build.constUint(0), build.vmReg(3), build.constInt(-1));
build.inst(IrCmd::JUMP_EQ_TAG, build.inst(IrCmd::LOAD_TAG, build.vmReg(0)), build.constTag(tnumber), a, b);
build.beginBlock(a);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(2), build.inst(IrCmd::LOAD_TVALUE, build.vmReg(0)));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(b);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(2), build.inst(IrCmd::LOAD_TVALUE, build.vmReg(1)));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.constUint(0), build.vmReg(2), build.constInt(-1));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1, bb_2
; in regs: R0, R1
; out regs: R0, R1, R3...
FALLBACK_GETVARARGS 0u, R3, -1i
%1 = LOAD_TAG R0
JUMP_EQ_TAG %1, tnumber, bb_1, bb_2
bb_1:
; predecessors: bb_0
; successors: bb_3
; in regs: R0, R3...
; out regs: R2...
%3 = LOAD_TVALUE R0
STORE_TVALUE R2, %3
JUMP bb_3
bb_2:
; predecessors: bb_0
; successors: bb_3
; in regs: R1, R3...
; out regs: R2...
%6 = LOAD_TVALUE R1
STORE_TVALUE R2, %6
JUMP bb_3
bb_3:
; predecessors: bb_1, bb_2
; in regs: R2...
LOP_RETURN 0u, R2, -1i
)");
}
TEST_SUITE_END();

30
tests/Linter.test.cpp
View file

@ -733,6 +733,7 @@ end
TEST_CASE_FIXTURE(Fixture, "ImplicitReturn")
{
LintResult result = lint(R"(
--!nonstrict
function f1(a)
if not a then
return 5
@ -789,20 +790,21 @@ return f1,f2,f3,f4,f5,f6,f7
)");
REQUIRE(3 == result.warnings.size());
CHECK_EQ(result.warnings[0].location.begin.line, 4);
CHECK_EQ(result.warnings[0].location.begin.line, 5);
CHECK_EQ(result.warnings[0].text,
"Function 'f1' can implicitly return no values even though there's an explicit return at line 4; add explicit return to silence");
CHECK_EQ(result.warnings[1].location.begin.line, 28);
"Function 'f1' can implicitly return no values even though there's an explicit return at line 5; add explicit return to silence");
CHECK_EQ(result.warnings[1].location.begin.line, 29);
CHECK_EQ(result.warnings[1].text,
"Function 'f4' can implicitly return no values even though there's an explicit return at line 25; add explicit return to silence");
CHECK_EQ(result.warnings[2].location.begin.line, 44);
"Function 'f4' can implicitly return no values even though there's an explicit return at line 26; add explicit return to silence");
CHECK_EQ(result.warnings[2].location.begin.line, 45);
CHECK_EQ(result.warnings[2].text,
"Function can implicitly return no values even though there's an explicit return at line 44; add explicit return to silence");
"Function can implicitly return no values even though there's an explicit return at line 45; add explicit return to silence");
}
TEST_CASE_FIXTURE(Fixture, "ImplicitReturnInfiniteLoop")
{
LintResult result = lint(R"(
--!nonstrict
function f1(a)
while true do
if math.random() > 0.5 then
@ -845,12 +847,12 @@ return f1,f2,f3,f4
)");
REQUIRE(2 == result.warnings.size());
CHECK_EQ(result.warnings[0].location.begin.line, 25);
CHECK_EQ(result.warnings[0].location.begin.line, 26);
CHECK_EQ(result.warnings[0].text,
"Function 'f3' can implicitly return no values even though there's an explicit return at line 21; add explicit return to silence");
CHECK_EQ(result.warnings[1].location.begin.line, 36);
"Function 'f3' can implicitly return no values even though there's an explicit return at line 22; add explicit return to silence");
CHECK_EQ(result.warnings[1].location.begin.line, 37);
CHECK_EQ(result.warnings[1].text,
"Function 'f4' can implicitly return no values even though there's an explicit return at line 32; add explicit return to silence");
"Function 'f4' can implicitly return no values even though there's an explicit return at line 33; add explicit return to silence");
}
TEST_CASE_FIXTURE(Fixture, "TypeAnnotationsShouldNotProduceWarnings")
@ -1164,7 +1166,7 @@ os.date("!*t")
TEST_CASE_FIXTURE(Fixture, "FormatStringTyped")
{
LintResult result = lintTyped(R"~(
LintResult result = lint(R"~(
local s: string, nons = ...
string.match(s, "[]")
@ -1285,7 +1287,7 @@ TEST_CASE_FIXTURE(Fixture, "use_all_parent_scopes_for_globals")
local _bar: typeof(os.clock) = os.clock
)";
LintResult result = frontend.lint("A");
LintResult result = lintModule("A");
REQUIRE(0 == result.warnings.size());
}
@ -1471,7 +1473,7 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "DeprecatedApiTyped")
freeze(frontend.globals.globalTypes);
LintResult result = lintTyped(R"(
LintResult result = lint(R"(
return function (i: Instance)
i:Wait(1.0)
print(i.Name)
@ -1518,7 +1520,7 @@ end
TEST_CASE_FIXTURE(BuiltinsFixture, "TableOperations")
{
LintResult result = lintTyped(R"(
LintResult result = lint(R"(
local t = {}
local tt = {}

129
tests/Normalize.test.cpp
View file

@ -28,6 +28,18 @@ struct IsSubtypeFixture : Fixture
return ::Luau::isSubtype(a, b, NotNull{module->getModuleScope().get()}, builtinTypes, ice);
}
bool isConsistentSubtype(TypeId a, TypeId b)
{
Location location;
ModulePtr module = getMainModule();
REQUIRE(module);
if (!module->hasModuleScope())
FAIL("isSubtype: module scope data is not available");
return ::Luau::isConsistentSubtype(a, b, NotNull{module->getModuleScope().get()}, builtinTypes, ice);
}
};
} // namespace
@ -86,8 +98,8 @@ TEST_CASE_FIXTURE(IsSubtypeFixture, "functions_and_any")
// any makes things work even when it makes no sense.
CHECK(isSubtype(b, a));
CHECK(isSubtype(a, b));
CHECK(isConsistentSubtype(b, a));
CHECK(isConsistentSubtype(a, b));
}
TEST_CASE_FIXTURE(IsSubtypeFixture, "variadic_functions_with_no_head")
@ -163,6 +175,10 @@ TEST_CASE_FIXTURE(IsSubtypeFixture, "table_with_union_prop")
TEST_CASE_FIXTURE(IsSubtypeFixture, "table_with_any_prop")
{
ScopedFastFlag sffs[] = {
{"LuauTransitiveSubtyping", true},
};
check(R"(
local a: {x: number}
local b: {x: any}
@ -172,7 +188,8 @@ TEST_CASE_FIXTURE(IsSubtypeFixture, "table_with_any_prop")
TypeId b = requireType("b");
CHECK(isSubtype(a, b));
CHECK(isSubtype(b, a));
CHECK(!isSubtype(b, a));
CHECK(isConsistentSubtype(b, a));
}
TEST_CASE_FIXTURE(IsSubtypeFixture, "intersection")
@ -216,6 +233,10 @@ TEST_CASE_FIXTURE(IsSubtypeFixture, "union_and_intersection")
TEST_CASE_FIXTURE(IsSubtypeFixture, "tables")
{
ScopedFastFlag sffs[] = {
{"LuauTransitiveSubtyping", true},
};
check(R"(
local a: {x: number}
local b: {x: any}
@ -229,7 +250,8 @@ TEST_CASE_FIXTURE(IsSubtypeFixture, "tables")
TypeId d = requireType("d");
CHECK(isSubtype(a, b));
CHECK(isSubtype(b, a));
CHECK(!isSubtype(b, a));
CHECK(isConsistentSubtype(b, a));
CHECK(!isSubtype(c, a));
CHECK(!isSubtype(a, c));
@ -358,6 +380,92 @@ TEST_CASE_FIXTURE(IsSubtypeFixture, "metatable" * doctest::expected_failures{1})
}
#endif
TEST_CASE_FIXTURE(IsSubtypeFixture, "any_is_unknown_union_error")
{
ScopedFastFlag sffs[] = {
{"LuauTransitiveSubtyping", true},
};
check(R"(
local err = 5.nope.nope -- err is now an error type
local a : any
local b : (unknown | typeof(err))
)");
TypeId a = requireType("a");
TypeId b = requireType("b");
CHECK(isSubtype(a, b));
CHECK(isSubtype(b, a));
CHECK_EQ("*error-type*", toString(requireType("err")));
}
TEST_CASE_FIXTURE(IsSubtypeFixture, "any_intersect_T_is_T")
{
ScopedFastFlag sffs[] = {
{"LuauTransitiveSubtyping", true},
};
check(R"(
local a : (any & string)
local b : string
local c : number
)");
TypeId a = requireType("a");
TypeId b = requireType("b");
TypeId c = requireType("c");
CHECK(isSubtype(a, b));
CHECK(isSubtype(b, a));
CHECK(!isSubtype(a, c));
CHECK(!isSubtype(c, a));
}
TEST_CASE_FIXTURE(IsSubtypeFixture, "error_suppression")
{
ScopedFastFlag sffs[] = {
{"LuauTransitiveSubtyping", true},
};
check("");
TypeId any = builtinTypes->anyType;
TypeId err = builtinTypes->errorType;
TypeId str = builtinTypes->stringType;
TypeId unk = builtinTypes->unknownType;
CHECK(!isSubtype(any, err));
CHECK(isSubtype(err, any));
CHECK(isConsistentSubtype(any, err));
CHECK(isConsistentSubtype(err, any));
CHECK(!isSubtype(any, str));
CHECK(isSubtype(str, any));
CHECK(isConsistentSubtype(any, str));
CHECK(isConsistentSubtype(str, any));
CHECK(!isSubtype(any, unk));
CHECK(isSubtype(unk, any));
CHECK(isConsistentSubtype(any, unk));
CHECK(isConsistentSubtype(unk, any));
CHECK(!isSubtype(err, str));
CHECK(!isSubtype(str, err));
CHECK(isConsistentSubtype(err, str));
CHECK(isConsistentSubtype(str, err));
CHECK(!isSubtype(err, unk));
CHECK(!isSubtype(unk, err));
CHECK(isConsistentSubtype(err, unk));
CHECK(isConsistentSubtype(unk, err));
CHECK(isSubtype(str, unk));
CHECK(!isSubtype(unk, str));
CHECK(isConsistentSubtype(str, unk));
CHECK(!isConsistentSubtype(unk, str));
}
TEST_SUITE_END();
struct NormalizeFixture : Fixture
@ -692,4 +800,17 @@ TEST_CASE_FIXTURE(NormalizeFixture, "negations_of_tables")
CHECK("table" == toString(normal("Not<Not<tbl>>")));
}
TEST_CASE_FIXTURE(NormalizeFixture, "normalize_blocked_types")
{
ScopedFastFlag sff[] {
{"LuauNormalizeBlockedTypes", true},
};
Type blocked{BlockedType{}};
const NormalizedType* norm = normalizer.normalize(&blocked);
CHECK_EQ(normalizer.typeFromNormal(*norm), &blocked);
}
TEST_SUITE_END();

3
tests/RuntimeLimits.test.cpp
View file

@ -263,9 +263,8 @@ TEST_CASE_FIXTURE(LimitFixture, "typescript_port_of_Result_type")
)LUA";
CheckResult result = check(src);
CodeTooComplex ctc;
CHECK(hasError(result, &ctc));
CHECK(hasError<CodeTooComplex>(result));
}
TEST_SUITE_END();

25
tests/TypeInfer.anyerror.test.cpp
View file

@ -225,7 +225,10 @@ TEST_CASE_FIXTURE(Fixture, "calling_error_type_yields_error")
CHECK_EQ("unknown", err->name);
CHECK_EQ("*error-type*", toString(requireType("a")));
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("any", toString(requireType("a")));
else
CHECK_EQ("*error-type*", toString(requireType("a")));
}
TEST_CASE_FIXTURE(Fixture, "chain_calling_error_type_yields_error")
@ -234,7 +237,10 @@ TEST_CASE_FIXTURE(Fixture, "chain_calling_error_type_yields_error")
local a = Utility.Create "Foo" {}
)");
CHECK_EQ("*error-type*", toString(requireType("a")));
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("any", toString(requireType("a")));
else
CHECK_EQ("*error-type*", toString(requireType("a")));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "replace_every_free_type_when_unifying_a_complex_function_with_any")
@ -343,4 +349,19 @@ stat = stat and tonumber(stat) or stat
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(Fixture, "intersection_of_any_can_have_props")
{
// *blocked-130* ~ hasProp any & ~(false?), "_status"
CheckResult result = check(R"(
function foo(x: any, y)
if x then
return x._status
end
return y
end
)");
CHECK("(any, any) -> any" == toString(requireType("foo")));
}
TEST_SUITE_END();

13
tests/TypeInfer.builtins.test.cpp
View file

@ -704,11 +704,7 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "select_with_variadic_typepack_tail_and_strin
LUAU_REQUIRE_NO_ERRORS(result);
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("string", toString(requireType("foo")));
else
CHECK_EQ("any", toString(requireType("foo")));
CHECK_EQ("any", toString(requireType("foo")));
CHECK_EQ("any", toString(requireType("bar")));
CHECK_EQ("any", toString(requireType("baz")));
CHECK_EQ("any", toString(requireType("quux")));
@ -996,11 +992,16 @@ TEST_CASE_FIXTURE(BuiltinsFixture, "table_freeze_is_generic")
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Key 'b' not found in table '{| a: number |}'", toString(result.errors[0]));
CHECK(Location({13, 18}, {13, 23}) == result.errors[0].location);
CHECK_EQ("number", toString(requireType("a")));
CHECK_EQ("string", toString(requireType("b")));
CHECK_EQ("boolean", toString(requireType("c")));
CHECK_EQ("*error-type*", toString(requireType("d")));
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("any", toString(requireType("d")));
else
CHECK_EQ("*error-type*", toString(requireType("d")));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "set_metatable_needs_arguments")

380
tests/TypeInfer.cfa.test.cpp Normal file
View file

@ -0,0 +1,380 @@
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Fixture.h"
#include "Luau/Symbol.h"
#include "doctest.h"
using namespace Luau;
TEST_SUITE_BEGIN("ControlFlowAnalysis");
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
if not x then
return
end
local foo = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({6, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?, y: string?)
if not x then
return
elseif not y then
return
end
local foo = x
local bar = y
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({8, 24})));
CHECK_EQ("string", toString(requireTypeAtPosition({9, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_rand_return_elif_not_y_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?, y: string?)
if not x then
return
elseif math.random() > 0.5 then
return
elseif not y then
return
end
local foo = x
local bar = y
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 24})));
CHECK_EQ("string", toString(requireTypeAtPosition({11, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_rand_return_elif_not_y_fallthrough")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?, y: string?)
if not x then
return
elseif math.random() > 0.5 then
return
elseif not y then
end
local foo = x
local bar = y
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 24})));
CHECK_EQ("string?", toString(requireTypeAtPosition({11, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_elif_not_y_fallthrough_elif_not_z_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?, y: string?, z: string?)
if not x then
return
elseif not y then
elseif not z then
return
end
local foo = x
local bar = y
local baz = z
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 24})));
CHECK_EQ("string?", toString(requireTypeAtPosition({11, 24})));
CHECK_EQ("string?", toString(requireTypeAtPosition({12, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "do_if_not_x_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
do
if not x then
return
end
end
local foo = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({8, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "early_return_in_a_loop_which_isnt_guaranteed_to_run_first")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
while math.random() > 0.5 do
if not x then
return
end
local foo = x
end
local bar = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({7, 28})));
CHECK_EQ("string?", toString(requireTypeAtPosition({10, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "early_return_in_a_loop_which_is_guaranteed_to_run_first")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
repeat
if not x then
return
end
local foo = x
until math.random() > 0.5
local bar = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({7, 28})));
CHECK_EQ("string?", toString(requireTypeAtPosition({10, 24}))); // TODO: This is wrong, should be `string`.
}
TEST_CASE_FIXTURE(BuiltinsFixture, "early_return_in_a_loop_which_is_guaranteed_to_run_first_2")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
for i = 1, 10 do
if not x then
return
end
local foo = x
end
local bar = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({7, 28})));
CHECK_EQ("string?", toString(requireTypeAtPosition({10, 24}))); // TODO: This is wrong, should be `string`.
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_then_error")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
if not x then
error("oops")
end
local foo = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({6, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_then_assert_false")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
if not x then
assert(false)
end
local foo = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({6, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "if_not_x_return_if_not_y_return")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?, y: string?)
if not x then
return
end
if not y then
return
end
local foo = x
local bar = y
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({10, 24})));
CHECK_EQ("string", toString(requireTypeAtPosition({11, 24})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "type_alias_does_not_leak_out")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
if typeof(x) == "string" then
return
else
type Foo = number
end
local foo: Foo = x
end
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Unknown type 'Foo'", toString(result.errors[0]));
CHECK_EQ("nil", toString(requireTypeAtPosition({8, 29})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "prototyping_and_visiting_alias_has_the_same_scope")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
// In CGB, we walk the block to prototype aliases. We then visit the block in-order, which will resolve the prototype to a real type.
// That second walk assumes that the name occurs in the same `Scope` that the prototype walk had. If we arbitrarily change scope midway
// through, we'd invoke UB.
CheckResult result = check(R"(
local function f(x: string?)
type Foo = number
if typeof(x) == "string" then
return
end
local foo: Foo = x
end
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK_EQ("Type 'nil' could not be converted into 'number'", toString(result.errors[0]));
CHECK_EQ("nil", toString(requireTypeAtPosition({8, 29})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "tagged_unions")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
type Ok<T> = { tag: "ok", value: T }
type Err<E> = { tag: "err", error: E }
type Result<T, E> = Ok<T> | Err<E>
local function map<T, U, E>(result: Result<T, E>, f: (T) -> U): Result<U, E>
if result.tag == "ok" then
local tag = result.tag
local val = result.value
return { tag = "ok", value = f(result.value) }
end
local tag = result.tag
local err = result.error
return result
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("\"ok\"", toString(requireTypeAtPosition({7, 35})));
CHECK_EQ("T", toString(requireTypeAtPosition({8, 35})));
CHECK_EQ("\"err\"", toString(requireTypeAtPosition({13, 31})));
CHECK_EQ("E", toString(requireTypeAtPosition({14, 31})));
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("{| error: E, tag: \"err\" |}", toString(requireTypeAtPosition({16, 19})));
else
CHECK_EQ("Err<E>", toString(requireTypeAtPosition({16, 19})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "do_assert_x")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
CheckResult result = check(R"(
local function f(x: string?)
do
assert(x)
end
local foo = x
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK_EQ("string", toString(requireTypeAtPosition({6, 24})));
}
TEST_SUITE_END();

18
tests/TypeInfer.loops.test.cpp
View file

@ -689,4 +689,22 @@ TEST_CASE_FIXTURE(Fixture, "for_loop_lower_bound_is_string_3")
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(BuiltinsFixture, "cli_68448_iterators_need_not_accept_nil")
{
CheckResult result = check(R"(
local function makeEnum(members)
local enum = {}
for _, memberName in ipairs(members) do
enum[memberName] = memberName
end
return enum
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
// HACK (CLI-68453): We name this inner table `enum`. For now, use the
// exhaustive switch to see past it.
CHECK(toString(requireType("makeEnum"), {true}) == "<a>({a}) -> {| [a]: a |}");
}
TEST_SUITE_END();

17
tests/TypeInfer.modules.test.cpp
View file

@ -485,6 +485,8 @@ return unpack(l0[_])
TEST_CASE_FIXTURE(BuiltinsFixture, "check_imported_module_names")
{
ScopedFastFlag sff{"LuauTinyControlFlowAnalysis", true};
fileResolver.source["game/A"] = R"(
return function(...) end
)";
@ -506,19 +508,10 @@ return l0
ModulePtr mod = getMainModule();
REQUIRE(mod);
if (FFlag::DebugLuauDeferredConstraintResolution)
{
REQUIRE(mod->scopes.size() >= 4);
CHECK(mod->scopes[0].second->importedModules["l0"] == "game/B");
CHECK(mod->scopes[3].second->importedModules["l1"] == "game/A");
}
else
{
REQUIRE(mod->scopes.size() >= 3);
CHECK(mod->scopes[0].second->importedModules["l0"] == "game/B");
CHECK(mod->scopes[2].second->importedModules["l1"] == "game/A");
}
REQUIRE(mod->scopes.size() == 4);
CHECK(mod->scopes[0].second->importedModules["l0"] == "game/B");
CHECK(mod->scopes[3].second->importedModules["l1"] == "game/A");
}
TEST_SUITE_END();

17
tests/TypeInfer.oop.test.cpp
View file

@ -309,4 +309,21 @@ TEST_CASE_FIXTURE(Fixture, "dont_bind_free_tables_to_themselves")
)");
}
// We should probably flag an error on this. See CLI-68672
TEST_CASE_FIXTURE(BuiltinsFixture, "flag_when_index_metamethod_returns_0_values")
{
CheckResult result = check(R"(
local T = {}
function T.__index()
end
local a = setmetatable({}, T)
local p = a.prop
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK("nil" == toString(requireType("p")));
}
TEST_SUITE_END();

24
tests/TypeInfer.operators.test.cpp
View file

@ -1109,4 +1109,28 @@ local f1 = f or 'f'
CHECK("string" == toString(requireType("f1")));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "reducing_and")
{
ScopedFastFlag sff[]{
{"LuauTryhardAnd", true},
{"LuauReducingAndOr", true},
};
CheckResult result = check(R"(
type Foo = { name: string?, flag: boolean? }
local arr: {Foo} = {}
local function foo(arg: {name: string}?)
local name = if arg and arg.name then arg.name else nil
table.insert(arr, {
name = name or "",
flag = name ~= nil and name ~= "",
})
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_SUITE_END();

11
tests/TypeInfer.provisional.test.cpp
View file

@ -470,6 +470,10 @@ TEST_CASE_FIXTURE(Fixture, "dcr_can_partially_dispatch_a_constraint")
TEST_CASE_FIXTURE(Fixture, "free_options_cannot_be_unified_together")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
TypeArena arena;
TypeId nilType = builtinTypes->nilType;
@ -488,7 +492,7 @@ TEST_CASE_FIXTURE(Fixture, "free_options_cannot_be_unified_together")
u.tryUnify(option1, option2);
CHECK(u.errors.empty());
CHECK(!u.failure);
u.log.commit();
@ -548,7 +552,10 @@ return wrapStrictTable(Constants, "Constants")
std::optional<TypeId> result = first(m->returnType);
REQUIRE(result);
CHECK(get<AnyType>(*result));
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("(any?) & ~table", toString(*result));
else
CHECK_MESSAGE(get<AnyType>(*result), *result);
}
TEST_CASE_FIXTURE(BuiltinsFixture, "generic_type_leak_to_module_interface_variadic")

3
tests/TypeInfer.refinements.test.cpp
View file

@ -1615,7 +1615,8 @@ TEST_CASE_FIXTURE(Fixture, "refine_a_property_of_some_global")
)");
LUAU_REQUIRE_ERROR_COUNT(3, result);
CHECK_EQ("*error-type*", toString(requireTypeAtPosition({4, 30})));
CHECK_EQ("~false & ~nil", toString(requireTypeAtPosition({4, 30})));
}
TEST_CASE_FIXTURE(BuiltinsFixture, "dataflow_analysis_can_tell_refinements_when_its_appropriate_to_refine_into_nil_or_never")

12
tests/TypeInfer.tables.test.cpp
View file

@ -1590,8 +1590,16 @@ TEST_CASE_FIXTURE(Fixture, "casting_tables_with_props_into_table_with_indexer4")
local hi: number = foo({ a = "hi" }, "a") -- shouldn't typecheck since at runtime hi is "hi"
)");
// This typechecks but shouldn't
LUAU_REQUIRE_NO_ERRORS(result);
if (FFlag::DebugLuauDeferredConstraintResolution)
{
LUAU_REQUIRE_ERROR_COUNT(1, result);
CHECK(toString(result.errors[0]) == "Type 'string' could not be converted into 'number'");
}
else
{
// This typechecks but shouldn't
LUAU_REQUIRE_NO_ERRORS(result);
}
}
TEST_CASE_FIXTURE(Fixture, "table_subtyping_with_missing_props_dont_report_multiple_errors")

13
tests/TypeInfer.test.cpp
View file

@ -103,6 +103,16 @@ TEST_CASE_FIXTURE(Fixture, "infer_in_nocheck_mode")
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(Fixture, "obvious_type_error_in_nocheck_mode")
{
CheckResult result = check(R"(
--!nocheck
local x: string = 5
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(Fixture, "expr_statement")
{
CheckResult result = check("local foo = 5 foo()");
@ -1185,6 +1195,9 @@ TEST_CASE_FIXTURE(Fixture, "dcr_delays_expansion_of_function_containing_blocked_
ScopedFastFlag sff[] = {
{"DebugLuauDeferredConstraintResolution", true},
{"LuauTinyUnifyNormalsFix", true},
// If we run this with error-suppression, it triggers an assertion.
// FATAL ERROR: Assertion failed: !"Internal error: Trying to normalize a BlockedType"
{"LuauTransitiveSubtyping", false},
};
CheckResult result = check(R"(

35
tests/TypeInfer.tryUnify.test.cpp
View file

@ -27,16 +27,25 @@ TEST_SUITE_BEGIN("TryUnifyTests");
TEST_CASE_FIXTURE(TryUnifyFixture, "primitives_unify")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
Type numberOne{TypeVariant{PrimitiveType{PrimitiveType::Number}}};
Type numberTwo = numberOne;
state.tryUnify(&numberTwo, &numberOne);
CHECK(!state.failure);
CHECK(state.errors.empty());
}
TEST_CASE_FIXTURE(TryUnifyFixture, "compatible_functions_are_unified")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
Type functionOne{
TypeVariant{FunctionType(arena.addTypePack({arena.freshType(globalScope->level)}), arena.addTypePack({builtinTypes->numberType}))}};
@ -44,6 +53,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "compatible_functions_are_unified")
FunctionType(arena.addTypePack({arena.freshType(globalScope->level)}), arena.addTypePack({arena.freshType(globalScope->level)}))}};
state.tryUnify(&functionTwo, &functionOne);
CHECK(!state.failure);
CHECK(state.errors.empty());
state.log.commit();
@ -53,6 +63,10 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "compatible_functions_are_unified")
TEST_CASE_FIXTURE(TryUnifyFixture, "incompatible_functions_are_preserved")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
TypePackVar argPackOne{TypePack{{arena.freshType(globalScope->level)}, std::nullopt}};
Type functionOne{
TypeVariant{FunctionType(arena.addTypePack({arena.freshType(globalScope->level)}), arena.addTypePack({builtinTypes->numberType}))}};
@ -66,6 +80,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "incompatible_functions_are_preserved")
Type functionTwoSaved = functionTwo;
state.tryUnify(&functionTwo, &functionOne);
CHECK(state.failure);
CHECK(!state.errors.empty());
CHECK_EQ(functionOne, functionOneSaved);
@ -74,6 +89,10 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "incompatible_functions_are_preserved")
TEST_CASE_FIXTURE(TryUnifyFixture, "tables_can_be_unified")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
Type tableOne{TypeVariant{
TableType{{{"foo", {arena.freshType(globalScope->level)}}}, std::nullopt, globalScope->level, TableState::Unsealed},
}};
@ -86,6 +105,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "tables_can_be_unified")
state.tryUnify(&tableTwo, &tableOne);
CHECK(!state.failure);
CHECK(state.errors.empty());
state.log.commit();
@ -95,6 +115,10 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "tables_can_be_unified")
TEST_CASE_FIXTURE(TryUnifyFixture, "incompatible_tables_are_preserved")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
Type tableOne{TypeVariant{
TableType{{{"foo", {arena.freshType(globalScope->level)}}, {"bar", {builtinTypes->numberType}}}, std::nullopt, globalScope->level,
TableState::Unsealed},
@ -109,6 +133,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "incompatible_tables_are_preserved")
state.tryUnify(&tableTwo, &tableOne);
CHECK(state.failure);
CHECK_EQ(1, state.errors.size());
CHECK_NE(*getMutable<TableType>(&tableOne)->props["foo"].type, *getMutable<TableType>(&tableTwo)->props["foo"].type);
@ -218,6 +243,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "variadic_type_pack_unification")
TypePackVar variadicPack{VariadicTypePack{builtinTypes->numberType}};
state.tryUnify(&testPack, &variadicPack);
CHECK(state.failure);
CHECK(!state.errors.empty());
}
@ -228,6 +254,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "variadic_tails_respect_progress")
TypePackVar b{TypePack{{builtinTypes->numberType, builtinTypes->stringType}, &variadicPack}};
state.tryUnify(&b, &a);
CHECK(!state.failure);
CHECK(state.errors.empty());
}
@ -270,8 +297,7 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "free_tail_is_grown_properly")
arena.addTypePack(TypePack{{builtinTypes->numberType, builtinTypes->numberType, builtinTypes->numberType}, std::nullopt});
TypePackId numberAndFreeTail = arena.addTypePack(TypePack{{builtinTypes->numberType}, arena.addTypePack(TypePackVar{FreeTypePack{TypeLevel{}}})});
ErrorVec unifyErrors = state.canUnify(numberAndFreeTail, threeNumbers);
CHECK(unifyErrors.size() == 0);
CHECK(state.canUnify(numberAndFreeTail, threeNumbers).empty());
}
TEST_CASE_FIXTURE(TryUnifyFixture, "recursive_metatable_getmatchtag")
@ -321,7 +347,10 @@ TEST_CASE_FIXTURE(TryUnifyFixture, "txnlog_preserves_pack_owner")
TEST_CASE_FIXTURE(TryUnifyFixture, "metatables_unify_against_shape_of_free_table")
{
ScopedFastFlag sff("DebugLuauDeferredConstraintResolution", true);
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
{"DebugLuauDeferredConstraintResolution", true},
};
TableType::Props freeProps{
{"foo", {builtinTypes->numberType}},

58
tests/TypeInfer.unionTypes.test.cpp
View file

@ -715,4 +715,62 @@ TEST_CASE_FIXTURE(Fixture, "less_greedy_unification_with_union_types_2")
CHECK_EQ("({| x: number |} | {| x: string |}) -> number | string", toString(requireType("f")));
}
TEST_CASE_FIXTURE(Fixture, "union_table_any_property")
{
CheckResult result = check(R"(
function f(x)
-- x : X
-- sup : { p : { q : X } }?
local sup = if true then { p = { q = x } } else nil
local sub : { p : any }
sup = nil
sup = sub
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(Fixture, "union_function_any_args")
{
CheckResult result = check(R"(
local sup : ((...any) -> (...any))?
local sub : ((number) -> (...any))
sup = sub
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(Fixture, "optional_any")
{
CheckResult result = check(R"(
local sup : any?
local sub : number
sup = sub
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(Fixture, "generic_function_with_optional_arg")
{
ScopedFastFlag sff[] = {
{"LuauTransitiveSubtyping", true},
};
CheckResult result = check(R"(
function f<T>(x : T?) : {T}
local result = {}
if x then
result[1] = x
end
return result
end
local t : {string} = f(nil)
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_SUITE_END();

9
tests/TypeInfer.unknownnever.test.cpp
View file

@ -303,6 +303,7 @@ TEST_CASE_FIXTURE(Fixture, "dont_unify_operands_if_one_of_the_operand_is_never_i
{
ScopedFastFlag sff[]{
{"LuauTryhardAnd", true},
{"LuauReducingAndOr", true},
};
CheckResult result = check(R"(
@ -313,13 +314,7 @@ TEST_CASE_FIXTURE(Fixture, "dont_unify_operands_if_one_of_the_operand_is_never_i
LUAU_REQUIRE_NO_ERRORS(result);
if (FFlag::DebugLuauDeferredConstraintResolution)
CHECK_EQ("<a>(nil, a) -> boolean", toString(requireType("ord")));
else
{
// Widening doesn't normalize yet, so the result is a bit strange
CHECK_EQ("<a>(nil, a) -> boolean | boolean", toString(requireType("ord")));
}
CHECK_EQ("<a>(nil, a) -> boolean", toString(requireType("ord")));
}
TEST_CASE_FIXTURE(Fixture, "math_operators_and_never")

15
tests/conformance/tables.lua
View file

@ -578,6 +578,21 @@ do
assert(#t2 == 6)
end
-- test boundary invariant in sparse arrays or various kinds
do
local function obscuredalloc() return {} end
local bits = 16
for i = 1, 2^bits - 1 do
local t1 = obscuredalloc() -- to avoid NEWTABLE guessing correct size
for k = 1, bits do
t1[k] = if bit32.extract(i, k - 1) == 1 then true else nil
end
end
end
-- test table.unpack fastcall for rejecting large unpacks
do
local ok, res = pcall(function()

35
tools/faillist.txt
View file

@ -31,8 +31,6 @@ BuiltinTests.table_pack_reduce
BuiltinTests.table_pack_variadic
DefinitionTests.class_definition_overload_metamethods
DefinitionTests.class_definition_string_props
FrontendTest.environments
FrontendTest.nocheck_cycle_used_by_checked
GenericsTests.apply_type_function_nested_generics2
GenericsTests.better_mismatch_error_messages
GenericsTests.bound_tables_do_not_clone_original_fields
@ -54,19 +52,6 @@ GenericsTests.self_recursive_instantiated_param
IntersectionTypes.table_intersection_write_sealed
IntersectionTypes.table_intersection_write_sealed_indirect
IntersectionTypes.table_write_sealed_indirect
ModuleTests.clone_self_property
NonstrictModeTests.for_in_iterator_variables_are_any
NonstrictModeTests.function_parameters_are_any
NonstrictModeTests.inconsistent_module_return_types_are_ok
NonstrictModeTests.inconsistent_return_types_are_ok
NonstrictModeTests.infer_nullary_function
NonstrictModeTests.infer_the_maximum_number_of_values_the_function_could_return
NonstrictModeTests.inline_table_props_are_also_any
NonstrictModeTests.local_tables_are_not_any
NonstrictModeTests.locals_are_any_by_default
NonstrictModeTests.offer_a_hint_if_you_use_a_dot_instead_of_a_colon
NonstrictModeTests.parameters_having_type_any_are_optional
NonstrictModeTests.table_props_are_any
ProvisionalTests.assign_table_with_refined_property_with_a_similar_type_is_illegal
ProvisionalTests.bail_early_if_unification_is_too_complicated
ProvisionalTests.do_not_ice_when_trying_to_pick_first_of_generic_type_pack
@ -85,9 +70,7 @@ RefinementTest.typeguard_in_assert_position
RefinementTest.x_as_any_if_x_is_instance_elseif_x_is_table
RuntimeLimits.typescript_port_of_Result_type
TableTests.a_free_shape_cannot_turn_into_a_scalar_if_it_is_not_compatible
TableTests.any_when_indexing_into_an_unsealed_table_with_no_indexer_in_nonstrict_mode
TableTests.casting_tables_with_props_into_table_with_indexer3
TableTests.casting_tables_with_props_into_table_with_indexer4
TableTests.checked_prop_too_early
TableTests.disallow_indexing_into_an_unsealed_table_with_no_indexer_in_strict_mode
TableTests.dont_crash_when_setmetatable_does_not_produce_a_metatabletypevar
@ -117,7 +100,6 @@ TableTests.missing_metatable_for_sealed_tables_do_not_get_inferred
TableTests.mixed_tables_with_implicit_numbered_keys
TableTests.nil_assign_doesnt_hit_indexer
TableTests.ok_to_set_nil_even_on_non_lvalue_base_expr
TableTests.only_ascribe_synthetic_names_at_module_scope
TableTests.oop_polymorphic
TableTests.quantify_even_that_table_was_never_exported_at_all
TableTests.quantify_metatables_of_metatables_of_table
@ -138,7 +120,6 @@ ToString.named_metatable_toStringNamedFunction
ToString.toStringDetailed2
ToString.toStringErrorPack
ToString.toStringNamedFunction_generic_pack
ToString.toStringNamedFunction_map
TryUnifyTests.members_of_failed_typepack_unification_are_unified_with_errorType
TryUnifyTests.result_of_failed_typepack_unification_is_constrained
TryUnifyTests.typepack_unification_should_trim_free_tails
@ -154,15 +135,11 @@ TypeAliases.type_alias_local_rename
TypeAliases.type_alias_locations
TypeAliases.type_alias_of_an_imported_recursive_generic_type
TypeInfer.check_type_infer_recursion_count
TypeInfer.checking_should_not_ice
TypeInfer.cli_50041_committing_txnlog_in_apollo_client_error
TypeInfer.dont_report_type_errors_within_an_AstExprError
TypeInfer.dont_report_type_errors_within_an_AstStatError
TypeInfer.fuzz_free_table_type_change_during_index_check
TypeInfer.globals
TypeInfer.globals2
TypeInfer.infer_assignment_value_types_mutable_lval
TypeInfer.it_is_ok_to_have_inconsistent_number_of_return_values_in_nonstrict
TypeInfer.no_stack_overflow_from_isoptional
TypeInfer.no_stack_overflow_from_isoptional2
TypeInfer.tc_after_error_recovery_no_replacement_name_in_error
@ -173,17 +150,13 @@ TypeInferClasses.classes_without_overloaded_operators_cannot_be_added
TypeInferClasses.index_instance_property
TypeInferClasses.table_class_unification_reports_sane_errors_for_missing_properties
TypeInferClasses.warn_when_prop_almost_matches
TypeInferFunctions.calling_function_with_anytypepack_doesnt_leak_free_types
TypeInferFunctions.cannot_hoist_interior_defns_into_signature
TypeInferFunctions.check_function_before_lambda_that_uses_it
TypeInferFunctions.dont_give_other_overloads_message_if_only_one_argument_matching_overload_exists
TypeInferFunctions.duplicate_functions_with_different_signatures_not_allowed_in_nonstrict
TypeInferFunctions.function_cast_error_uses_correct_language
TypeInferFunctions.function_decl_non_self_sealed_overwrite_2
TypeInferFunctions.function_decl_non_self_unsealed_overwrite
TypeInferFunctions.function_does_not_return_enough_values
TypeInferFunctions.function_statement_sealed_table_assignment_through_indexer
TypeInferFunctions.improved_function_arg_mismatch_error_nonstrict
TypeInferFunctions.improved_function_arg_mismatch_errors
TypeInferFunctions.infer_anonymous_function_arguments
TypeInferFunctions.infer_that_function_does_not_return_a_table
@ -191,7 +164,6 @@ TypeInferFunctions.luau_subtyping_is_np_hard
TypeInferFunctions.no_lossy_function_type
TypeInferFunctions.occurs_check_failure_in_function_return_type
TypeInferFunctions.record_matching_overload
TypeInferFunctions.report_exiting_without_return_nonstrict
TypeInferFunctions.report_exiting_without_return_strict
TypeInferFunctions.return_type_by_overload
TypeInferFunctions.too_few_arguments_variadic
@ -204,11 +176,9 @@ TypeInferLoops.for_in_loop_error_on_factory_not_returning_the_right_amount_of_va
TypeInferLoops.for_in_loop_with_next
TypeInferLoops.for_in_with_generic_next
TypeInferLoops.loop_iter_metamethod_ok_with_inference
TypeInferLoops.loop_iter_no_indexer_nonstrict
TypeInferLoops.loop_iter_trailing_nil
TypeInferLoops.properly_infer_iteratee_is_a_free_table
TypeInferLoops.unreachable_code_after_infinite_loop
TypeInferModules.custom_require_global
TypeInferModules.do_not_modify_imported_types_5
TypeInferModules.module_type_conflict
TypeInferModules.module_type_conflict_instantiated
@ -220,18 +190,14 @@ TypeInferOperators.cli_38355_recursive_union
TypeInferOperators.compound_assign_metatable
TypeInferOperators.compound_assign_mismatch_metatable
TypeInferOperators.disallow_string_and_types_without_metatables_from_arithmetic_binary_ops
TypeInferOperators.in_nonstrict_mode_strip_nil_from_intersections_when_considering_relational_operators
TypeInferOperators.infer_any_in_all_modes_when_lhs_is_unknown
TypeInferOperators.operator_eq_completely_incompatible
TypeInferOperators.typecheck_overloaded_multiply_that_is_an_intersection
TypeInferOperators.typecheck_overloaded_multiply_that_is_an_intersection_on_rhs
TypeInferOperators.typecheck_unary_len_error
TypeInferOperators.UnknownGlobalCompoundAssign
TypeInferOperators.unrelated_classes_cannot_be_compared
TypeInferOperators.unrelated_primitives_cannot_be_compared
TypeInferPrimitives.CheckMethodsOfNumber
TypeInferPrimitives.string_index
TypeInferUnknownNever.assign_to_global_which_is_never
TypeInferUnknownNever.dont_unify_operands_if_one_of_the_operand_is_never_in_any_ordering_operators
TypeInferUnknownNever.math_operators_and_never
TypePackTests.detect_cyclic_typepacks2
@ -250,6 +216,7 @@ TypeSingletons.table_properties_type_error_escapes
TypeSingletons.taking_the_length_of_union_of_string_singleton
TypeSingletons.widen_the_supertype_if_it_is_free_and_subtype_has_singleton
TypeSingletons.widening_happens_almost_everywhere
UnionTypes.generic_function_with_optional_arg
UnionTypes.index_on_a_union_type_with_missing_property
UnionTypes.optional_assignment_errors
UnionTypes.optional_call_error